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<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:podcast="https://podcastindex.org/namespace/1.0" xmlns:media="http://search.yahoo.com/mrss/" version="2.0"><channel><title>Treatise on Light</title><link>https://www.spreaker.com/podcast/treatise-on-light--7009401</link><description><![CDATA[Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface (refraction and reflection). A large portion of the book is devoted to the double refraction occurring in Iceland chrystal, and all drawn conclusions are proved geometrically. Christiaan Huygens (1629 - 1695) was a prominent physicist and astronomer. His main discoveries are the centrifugal force, collision laws for bodies and the argument that light consists of waves. He was a contemporary of Galilei and Descartes, and a member of the French Royal Society since 1663. (Summary by Availle)]]></description><atom:link href="https://www.spreaker.com/show/7009401/episodes/feed" rel="self" type="application/rss+xml"/><language>en</language><category>Books</category><copyright>Copyright Biographies  Genre</copyright><image><url>https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg</url><title>Treatise on Light</title><link>https://www.spreaker.com/podcast/treatise-on-light--7009401</link></image><lastBuildDate>Mon, 24 Aug 2026 09:50:12 +0000</lastBuildDate><itunes:author>Christiaan Huygens</itunes:author><itunes:owner><itunes:name>Biographies  Genre</itunes:name><itunes:email>spreaker40@podcastlibrary.org</itunes:email></itunes:owner><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:subtitle>Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface...</itunes:subtitle><itunes:summary><![CDATA[Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface (refraction and reflection). A large portion of the book is devoted to the double refraction occurring in Iceland chrystal, and all drawn conclusions are proved geometrically. Christiaan Huygens (1629 - 1695) was a prominent physicist and astronomer. His main discoveries are the centrifugal force, collision laws for bodies and the argument that light consists of waves. He was a contemporary of Galilei and Descartes, and a member of the French Royal Society since 1663. (Summary by Availle)]]></itunes:summary><itunes:category text="Arts"><itunes:category text="Books"/></itunes:category><itunes:category text="Science"/><itunes:category text="Science"><itunes:category text="Astronomy"/></itunes:category><itunes:explicit>false</itunes:explicit><podcast:guid>4474fa9e-2177-5482-b460-13c648b8790e</podcast:guid><itunes:type>episodic</itunes:type><item><title>Canadian Scenery, Volume 1-Nathaniel Parker Willis</title><link>https://www.spreaker.com/episode/canadian-scenery-volume-1-nathaniel-parker-willis--74455806</link><description><![CDATA[Canadian Scenery, Volume 1 by Nathaniel Parker Willis invites listeners to explore the breathtaking landscapes and rich cultural tapestry of Canada through the author's vivid prose. This work captures the essence of the Canadian wilderness, portraying its natural beauty and the unique experiences it offers. As listeners journey through Willis's descriptive narrative, they are reminded of the timeless allure of nature and the importance of appreciating the world around us. The themes of exploration and appreciation for the environment resonate powerfully today, encouraging a renewed connection to the landscapes that shape our lives. This enduring classic serves as a celebration of both the beauty of Canada and the art of descriptive writing.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74455806</guid><pubDate>Mon, 24 Aug 2026 09:06:25 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74455806/canadian_scenery_volume_1_nathaniel_parker_willis.mp3" length="201200677" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>Canadian Scenery, Volume 1 by Nathaniel Parker Willis invites listeners to explore the breathtaking landscapes and rich cultural tapestry of Canada through the author's vivid prose. This work captures the essence of the Canadian wilderness, portraying...</itunes:subtitle><itunes:summary><![CDATA[Canadian Scenery, Volume 1 by Nathaniel Parker Willis invites listeners to explore the breathtaking landscapes and rich cultural tapestry of Canada through the author's vivid prose. This work captures the essence of the Canadian wilderness, portraying its natural beauty and the unique experiences it offers. As listeners journey through Willis's descriptive narrative, they are reminded of the timeless allure of nature and the importance of appreciating the world around us. The themes of exploration and appreciation for the environment resonate powerfully today, encouraging a renewed connection to the landscapes that shape our lives. This enduring classic serves as a celebration of both the beauty of Canada and the art of descriptive writing.]]></itunes:summary><itunes:duration>25125</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Pep The Story Of A Brave Dog-Clarence Hawkes</title><link>https://www.spreaker.com/episode/pep-the-story-of-a-brave-dog-clarence-hawkes--74407845</link><description><![CDATA["Pep The Story Of A Brave Dog" by Clarence Hawkes is a heartwarming tale that celebrates the loyalty and courage of a remarkable dog named Pep. This story resonates with themes of bravery and companionship, showcasing the strong bond between humans and their canine friends. As Pep embarks on his adventures, listeners are reminded of the enduring qualities of loyalty and heroism that transcend time and continue to inspire. The narrative serves as a poignant reflection on the unwavering spirit of animals, making it a timeless listen for anyone who appreciates the profound impact pets have on our lives. Discover the legacy of Pep and the lessons of bravery that remain relevant today.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74407845</guid><pubDate>Sun, 23 Aug 2026 09:05:47 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74407845/pep_the_story_of_a_brave_dog_clarence_hawkes.mp3" length="61588135" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Pep The Story Of A Brave Dog" by Clarence Hawkes is a heartwarming tale that celebrates the loyalty and courage of a remarkable dog named Pep. This story resonates with themes of bravery and companionship, showcasing the strong bond between humans...</itunes:subtitle><itunes:summary><![CDATA["Pep The Story Of A Brave Dog" by Clarence Hawkes is a heartwarming tale that celebrates the loyalty and courage of a remarkable dog named Pep. This story resonates with themes of bravery and companionship, showcasing the strong bond between humans and their canine friends. As Pep embarks on his adventures, listeners are reminded of the enduring qualities of loyalty and heroism that transcend time and continue to inspire. The narrative serves as a poignant reflection on the unwavering spirit of animals, making it a timeless listen for anyone who appreciates the profound impact pets have on our lives. Discover the legacy of Pep and the lessons of bravery that remain relevant today.]]></itunes:summary><itunes:duration>7691</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>America of the Fifties Letters of Fredrika Bremer-Fredrika Bremer</title><link>https://www.spreaker.com/episode/america-of-the-fifties-letters-of-fredrika-bremer-fredrika-bremer--74325508</link><description><![CDATA["America of the Fifties Letters of Fredrika Bremer" presents a unique glimpse into the American landscape through the eyes of Fredrika Bremer, a notable Swedish writer. Her correspondence from this pivotal decade captures the cultural shifts and societal norms of the time, offering insights that remain relevant today. The themes of exploration, identity, and the evolving American experience resonate with contemporary audiences, inviting reflection on how far society has come and the challenges that persist. Bremer's eloquent observations and keen understanding of human nature make her letters a timeless treasure, illuminating the complexities of a nation in transition.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74325508</guid><pubDate>Sat, 22 Aug 2026 09:05:18 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74325508/america_of_the_fifties_letters_of_fredrika_bremer_fredrika_bremer.mp3" length="246438964" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"America of the Fifties Letters of Fredrika Bremer" presents a unique glimpse into the American landscape through the eyes of Fredrika Bremer, a notable Swedish writer. Her correspondence from this pivotal decade captures the cultural shifts and...</itunes:subtitle><itunes:summary><![CDATA["America of the Fifties Letters of Fredrika Bremer" presents a unique glimpse into the American landscape through the eyes of Fredrika Bremer, a notable Swedish writer. Her correspondence from this pivotal decade captures the cultural shifts and societal norms of the time, offering insights that remain relevant today. The themes of exploration, identity, and the evolving American experience resonate with contemporary audiences, inviting reflection on how far society has come and the challenges that persist. Bremer's eloquent observations and keen understanding of human nature make her letters a timeless treasure, illuminating the complexities of a nation in transition.]]></itunes:summary><itunes:duration>30774</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>A Practical View of the Prevailing Religious System of Professed Christians-William Wilberforce</title><link>https://www.spreaker.com/episode/a-practical-view-of-the-prevailing-religious-system-of-professed-christians-william-wilberforce--74273307</link><description><![CDATA[William Wilberforce's "A Practical View of the Prevailing Religious System of Professed Christians" offers a critical examination of the religious practices and beliefs of his contemporaries. He delves into the inconsistencies and shortcomings he perceives within the Christian community, urging a more authentic and heartfelt approach to faith. This thought-provoking work remains relevant today as it challenges readers to reflect on the sincerity of their beliefs and the true essence of Christianity. Wilberforce’s insights encourage a deeper understanding of one's faith, making this audiobook a timeless exploration of spirituality and moral integrity that resonates across generations.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74273307</guid><pubDate>Fri, 21 Aug 2026 09:06:37 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74273307/a_practical_view_of_the_prevailing_religious_system_of_professed_christians_william_wilberforce.mp3" length="261922446" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>William Wilberforce's "A Practical View of the Prevailing Religious System of Professed Christians" offers a critical examination of the religious practices and beliefs of his contemporaries. He delves into the inconsistencies and shortcomings he...</itunes:subtitle><itunes:summary><![CDATA[William Wilberforce's "A Practical View of the Prevailing Religious System of Professed Christians" offers a critical examination of the religious practices and beliefs of his contemporaries. He delves into the inconsistencies and shortcomings he perceives within the Christian community, urging a more authentic and heartfelt approach to faith. This thought-provoking work remains relevant today as it challenges readers to reflect on the sincerity of their beliefs and the true essence of Christianity. Wilberforce’s insights encourage a deeper understanding of one's faith, making this audiobook a timeless exploration of spirituality and moral integrity that resonates across generations.]]></itunes:summary><itunes:duration>32708</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Animal Heroes-Ernest Thompson Seton</title><link>https://www.spreaker.com/episode/animal-heroes-ernest-thompson-seton--74153179</link><description><![CDATA["Animal Heroes" by Ernest Thompson Seton celebrates the remarkable lives and adventures of various animals, showcasing their intelligence, bravery, and unique personalities. This collection of stories highlights the deep connections between humans and animals, emphasizing themes of empathy, respect, and the importance of understanding the natural world. Seton's vivid storytelling and rich observations invite listeners to reflect on the enduring bond we share with the animal kingdom. As these tales resonate with timeless values of compassion and heroism, they remind us of the significance of honoring and protecting the creatures that inhabit our planet, making this audiobook a worthwhile experience for all.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74153179</guid><pubDate>Thu, 20 Aug 2026 09:06:27 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74153179/animal_heroes_ernest_thompson_seton.mp3" length="181061361" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Animal Heroes" by Ernest Thompson Seton celebrates the remarkable lives and adventures of various animals, showcasing their intelligence, bravery, and unique personalities. This collection of stories highlights the deep connections between humans and...</itunes:subtitle><itunes:summary><![CDATA["Animal Heroes" by Ernest Thompson Seton celebrates the remarkable lives and adventures of various animals, showcasing their intelligence, bravery, and unique personalities. This collection of stories highlights the deep connections between humans and animals, emphasizing themes of empathy, respect, and the importance of understanding the natural world. Seton's vivid storytelling and rich observations invite listeners to reflect on the enduring bond we share with the animal kingdom. As these tales resonate with timeless values of compassion and heroism, they remind us of the significance of honoring and protecting the creatures that inhabit our planet, making this audiobook a worthwhile experience for all.]]></itunes:summary><itunes:duration>22610</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Scientific American Supplement, No. 415, December 15, 1883-Various</title><link>https://www.spreaker.com/episode/scientific-american-supplement-no-415-december-15-1883-various--74101122</link><description><![CDATA["Scientific American Supplement, No. 415, December 15, 1883-Various" is a fascinating collection that captures the scientific discourse of its time, offering insights into the advancements and inquiries that shaped the understanding of the world in the late 19th century. This supplement reflects the curiosity and innovation of the era, showcasing various topics that highlight the intersection of science and society. Hearing this audiobook today allows listeners to appreciate the foundations of modern scientific thought and the enduring quest for knowledge that transcends time. The themes of exploration and discovery remain relevant, reminding us of the continuous evolution of human understanding and the importance of inquiry in our lives.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74101122</guid><pubDate>Wed, 19 Aug 2026 09:06:05 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74101122/scientific_american_supplement_no_415_december_15_1883_various.mp3" length="124581572" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Scientific American Supplement, No. 415, December 15, 1883-Various" is a fascinating collection that captures the scientific discourse of its time, offering insights into the advancements and inquiries that shaped the understanding of the world in...</itunes:subtitle><itunes:summary><![CDATA["Scientific American Supplement, No. 415, December 15, 1883-Various" is a fascinating collection that captures the scientific discourse of its time, offering insights into the advancements and inquiries that shaped the understanding of the world in the late 19th century. This supplement reflects the curiosity and innovation of the era, showcasing various topics that highlight the intersection of science and society. Hearing this audiobook today allows listeners to appreciate the foundations of modern scientific thought and the enduring quest for knowledge that transcends time. The themes of exploration and discovery remain relevant, reminding us of the continuous evolution of human understanding and the importance of inquiry in our lives.]]></itunes:summary><itunes:duration>15557</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Birds and Nature, Vol. VIII, No 5, December 1900-Various</title><link>https://www.spreaker.com/episode/birds-and-nature-vol-viii-no-5-december-1900-various--74046985</link><description><![CDATA["Birds and Nature, Vol. VIII, No 5, December 1900-Various" offers a captivating glimpse into the natural world as seen through the lens of early 20th-century perspectives. This volume, rich in observations and reflections on avian life and the environment, invites listeners to appreciate the beauty and complexity of nature. Its enduring themes of wonder and respect for the natural world resonate strongly today, reminding us of the importance of conservation and the interconnectedness of all living things. By exploring these timeless insights, audiences can reconnect with the awe that nature inspires, making this audiobook a valuable listening experience for anyone who cherishes the environment.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/74046985</guid><pubDate>Tue, 18 Aug 2026 09:06:02 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/74046985/birds_and_nature_vol_viii_no_5_december_1900_various.mp3" length="57154115" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Birds and Nature, Vol. VIII, No 5, December 1900-Various" offers a captivating glimpse into the natural world as seen through the lens of early 20th-century perspectives. This volume, rich in observations and reflections on avian life and the...</itunes:subtitle><itunes:summary><![CDATA["Birds and Nature, Vol. VIII, No 5, December 1900-Various" offers a captivating glimpse into the natural world as seen through the lens of early 20th-century perspectives. This volume, rich in observations and reflections on avian life and the environment, invites listeners to appreciate the beauty and complexity of nature. Its enduring themes of wonder and respect for the natural world resonate strongly today, reminding us of the importance of conservation and the interconnectedness of all living things. By exploring these timeless insights, audiences can reconnect with the awe that nature inspires, making this audiobook a valuable listening experience for anyone who cherishes the environment.]]></itunes:summary><itunes:duration>7137</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Strange Case of Dr. M. K. Jessup-Gray Barker, Morris K. Jessup</title><link>https://www.spreaker.com/episode/strange-case-of-dr-m-k-jessup-gray-barker-morris-k-jessup--73992852</link><description><![CDATA["Strange Case of Dr. M. K. Jessup" delves into the enigmatic life and theories of Morris K. Jessup, a figure whose explorations into the unknown challenge our understanding of reality. This audiobook invites listeners to engage with Jessup's thoughts on the nature of existence and the mysteries of the universe, themes that continue to resonate in today's quest for knowledge and truth. By examining the intersections of science, philosophy, and the paranormal, the narrative encourages a deeper reflection on the boundaries of human understanding. This timeless exploration invites listeners to ponder the strange and the extraordinary, making it a compelling listen for anyone fascinated by the unexplained.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73992852</guid><pubDate>Mon, 17 Aug 2026 09:05:58 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73992852/strange_case_of_dr_m_k_jessup_gray_barker_morris_k_jessup.mp3" length="68725498" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Strange Case of Dr. M. K. Jessup" delves into the enigmatic life and theories of Morris K. Jessup, a figure whose explorations into the unknown challenge our understanding of reality. This audiobook invites listeners to engage with Jessup's thoughts...</itunes:subtitle><itunes:summary><![CDATA["Strange Case of Dr. M. K. Jessup" delves into the enigmatic life and theories of Morris K. Jessup, a figure whose explorations into the unknown challenge our understanding of reality. This audiobook invites listeners to engage with Jessup's thoughts on the nature of existence and the mysteries of the universe, themes that continue to resonate in today's quest for knowledge and truth. By examining the intersections of science, philosophy, and the paranormal, the narrative encourages a deeper reflection on the boundaries of human understanding. This timeless exploration invites listeners to ponder the strange and the extraordinary, making it a compelling listen for anyone fascinated by the unexplained.]]></itunes:summary><itunes:duration>8582</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Birds and Nature, Vol. IX, No 3, March 1901-Various</title><link>https://www.spreaker.com/episode/birds-and-nature-vol-ix-no-3-march-1901-various--73938537</link><description><![CDATA["Birds and Nature, Vol. IX, No 3, March 1901" is a captivating collection that invites listeners to explore the intricate relationships between avian life and the natural world. This volume showcases the beauty and diversity of birds, offering insights that resonate with our ongoing appreciation for nature's wonders. The themes of observation and connection to the environment remain timeless, encouraging a deeper understanding of the ecosystems we inhabit. As we navigate modern challenges, the enduring wisdom found within these pages serves as a reminder of the importance of preserving the delicate balance of nature and the joy it brings to our lives.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73938537</guid><pubDate>Sun, 16 Aug 2026 09:05:41 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73938537/birds_and_nature_vol_ix_no_3_march_1901_various.mp3" length="73301365" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Birds and Nature, Vol. IX, No 3, March 1901" is a captivating collection that invites listeners to explore the intricate relationships between avian life and the natural world. This volume showcases the beauty and diversity of birds, offering...</itunes:subtitle><itunes:summary><![CDATA["Birds and Nature, Vol. IX, No 3, March 1901" is a captivating collection that invites listeners to explore the intricate relationships between avian life and the natural world. This volume showcases the beauty and diversity of birds, offering insights that resonate with our ongoing appreciation for nature's wonders. The themes of observation and connection to the environment remain timeless, encouraging a deeper understanding of the ecosystems we inhabit. As we navigate modern challenges, the enduring wisdom found within these pages serves as a reminder of the importance of preserving the delicate balance of nature and the joy it brings to our lives.]]></itunes:summary><itunes:duration>9154</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Scientific American Supplement, No. 601, July 9, 1887-Various</title><link>https://www.spreaker.com/episode/scientific-american-supplement-no-601-july-9-1887-various--73877396</link><description><![CDATA["Scientific American Supplement, No. 601, July 9, 1887-Various" presents a fascinating collection of scientific discussions and discoveries from the late 19th century, reflecting the era's intellectual curiosity and advancements. This volume captures the spirit of inquiry that defined the period, showcasing a variety of topics that continue to influence modern science. The themes of exploration and the quest for knowledge resonate strongly today, reminding us of the importance of scientific literacy and the ongoing pursuit of understanding the natural world.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73877396</guid><pubDate>Sat, 15 Aug 2026 09:06:13 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73877396/scientific_american_supplement_no_601_july_9_1887_various.mp3" length="110680477" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Scientific American Supplement, No. 601, July 9, 1887-Various" presents a fascinating collection of scientific discussions and discoveries from the late 19th century, reflecting the era's intellectual curiosity and advancements. This volume captures...</itunes:subtitle><itunes:summary><![CDATA["Scientific American Supplement, No. 601, July 9, 1887-Various" presents a fascinating collection of scientific discussions and discoveries from the late 19th century, reflecting the era's intellectual curiosity and advancements. This volume captures the spirit of inquiry that defined the period, showcasing a variety of topics that continue to influence modern science. The themes of exploration and the quest for knowledge resonate strongly today, reminding us of the importance of scientific literacy and the ongoing pursuit of understanding the natural world.]]></itunes:summary><itunes:duration>13821</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Fortune Hunter A Novel of New York Society-Anna Cora Mowatt Ritchie</title><link>https://www.spreaker.com/episode/fortune-hunter-a-novel-of-new-york-society-anna-cora-mowatt-ritchie--73803808</link><description><![CDATA["Fortune Hunter: A Novel of New York Society" by Anna Cora Mowatt Ritchie delves into the intricate dynamics of social ambition and the pursuit of wealth within the elite circles of New York society. This captivating tale explores themes of desire, status, and the lengths individuals will go to secure their place among the affluent. Its exploration of societal expectations and personal aspirations remains relevant today, as the quest for fortune and recognition continues to resonate in contemporary culture. Ritchie's insightful depiction of the complexities of social interactions offers listeners a timeless reflection on the human condition and the enduring allure of fortune.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73803808</guid><pubDate>Thu, 13 Aug 2026 09:03:40 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73803808/fortune_hunter_a_novel_of_new_york_society_anna_cora_mowatt_ritchie.mp3" length="215800025" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Fortune Hunter: A Novel of New York Society" by Anna Cora Mowatt Ritchie delves into the intricate dynamics of social ambition and the pursuit of wealth within the elite circles of New York society. This captivating tale explores themes of desire,...</itunes:subtitle><itunes:summary><![CDATA["Fortune Hunter: A Novel of New York Society" by Anna Cora Mowatt Ritchie delves into the intricate dynamics of social ambition and the pursuit of wealth within the elite circles of New York society. This captivating tale explores themes of desire, status, and the lengths individuals will go to secure their place among the affluent. Its exploration of societal expectations and personal aspirations remains relevant today, as the quest for fortune and recognition continues to resonate in contemporary culture. Ritchie's insightful depiction of the complexities of social interactions offers listeners a timeless reflection on the human condition and the enduring allure of fortune.]]></itunes:summary><itunes:duration>26948</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Kingdom of the Heavens-Charles Nordmann</title><link>https://www.spreaker.com/episode/kingdom-of-the-heavens-charles-nordmann--73766589</link><description><![CDATA["Kingdom of the Heavens" by Charles Nordmann invites listeners into a profound exploration of faith and spirituality, delving into the timeless quest for understanding our place in the universe. This work resonates with enduring themes of hope, belief, and the human spirit's resilience, making it a powerful reflection for contemporary audiences seeking meaning in a complex world. Nordmann's insights challenge us to contemplate the divine and our connections to one another, providing a sense of solace and inspiration. As we navigate our own journeys, this audiobook serves as a reminder of the enduring questions that have shaped humanity's relationship with the heavens above.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73766589</guid><pubDate>Wed, 12 Aug 2026 09:03:32 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73766589/kingdom_of_the_heavens_charles_nordmann.mp3" length="174474909" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Kingdom of the Heavens" by Charles Nordmann invites listeners into a profound exploration of faith and spirituality, delving into the timeless quest for understanding our place in the universe. This work resonates with enduring themes of hope,...</itunes:subtitle><itunes:summary><![CDATA["Kingdom of the Heavens" by Charles Nordmann invites listeners into a profound exploration of faith and spirituality, delving into the timeless quest for understanding our place in the universe. This work resonates with enduring themes of hope, belief, and the human spirit's resilience, making it a powerful reflection for contemporary audiences seeking meaning in a complex world. Nordmann's insights challenge us to contemplate the divine and our connections to one another, providing a sense of solace and inspiration. As we navigate our own journeys, this audiobook serves as a reminder of the enduring questions that have shaped humanity's relationship with the heavens above.]]></itunes:summary><itunes:duration>21788</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Outline of Science, Vol 2-J. Arthur Thomson</title><link>https://www.spreaker.com/episode/outline-of-science-vol-2-j-arthur-thomson--73733141</link><description><![CDATA["Outline of Science, Vol 2" by J. Arthur Thomson delves into the fundamental principles of science, offering a comprehensive overview that remains relevant today. This volume presents a structured exploration of scientific concepts and their implications, encouraging listeners to appreciate the intricate connections between various fields of inquiry. Thomson's work invites reflection on the enduring nature of scientific discovery and the quest for knowledge, themes that resonate in our modern world as we continue to seek understanding amidst rapid advancements. The clarity and depth of Thomson's insights make this audiobook a valuable resource for anyone interested in the foundations of science and its impact on society.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73733141</guid><pubDate>Tue, 11 Aug 2026 09:03:36 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73733141/outline_of_science_vol_2_j_arthur_thomson.mp3" length="258581442" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Outline of Science, Vol 2" by J. Arthur Thomson delves into the fundamental principles of science, offering a comprehensive overview that remains relevant today. This volume presents a structured exploration of scientific concepts and their...</itunes:subtitle><itunes:summary><![CDATA["Outline of Science, Vol 2" by J. Arthur Thomson delves into the fundamental principles of science, offering a comprehensive overview that remains relevant today. This volume presents a structured exploration of scientific concepts and their implications, encouraging listeners to appreciate the intricate connections between various fields of inquiry. Thomson's work invites reflection on the enduring nature of scientific discovery and the quest for knowledge, themes that resonate in our modern world as we continue to seek understanding amidst rapid advancements. The clarity and depth of Thomson's insights make this audiobook a valuable resource for anyone interested in the foundations of science and its impact on society.]]></itunes:summary><itunes:duration>32291</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Strange Case of Dr. M. K. Jessup-Gray Barker, Morris K. Jessup</title><link>https://www.spreaker.com/episode/strange-case-of-dr-m-k-jessup-gray-barker-morris-k-jessup--73708113</link><description><![CDATA["Strange Case of Dr. M. K. Jessup" by Gray Barker delves into the enigmatic life and theories of Morris K. Jessup, a figure whose explorations of the unknown continue to intrigue audiences today. This audiobook invites listeners to engage with themes of the extraordinary, the limits of human understanding, and the quest for knowledge that transcends conventional boundaries. As Jessup's ideas challenge perceptions of reality and invite contemplation of the cosmos, they resonate with contemporary questions about existence and our place in the universe. The enduring nature of these themes makes this work a thought-provoking experience for anyone fascinated by the mysteries that lie beyond our everyday lives.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73708113</guid><pubDate>Mon, 10 Aug 2026 09:03:54 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73708113/strange_case_of_dr_m_k_jessup_gray_barker_morris_k_jessup.mp3" length="68725498" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Strange Case of Dr. M. K. Jessup" by Gray Barker delves into the enigmatic life and theories of Morris K. Jessup, a figure whose explorations of the unknown continue to intrigue audiences today. This audiobook invites listeners to engage with themes...</itunes:subtitle><itunes:summary><![CDATA["Strange Case of Dr. M. K. Jessup" by Gray Barker delves into the enigmatic life and theories of Morris K. Jessup, a figure whose explorations of the unknown continue to intrigue audiences today. This audiobook invites listeners to engage with themes of the extraordinary, the limits of human understanding, and the quest for knowledge that transcends conventional boundaries. As Jessup's ideas challenge perceptions of reality and invite contemplation of the cosmos, they resonate with contemporary questions about existence and our place in the universe. The enduring nature of these themes makes this work a thought-provoking experience for anyone fascinated by the mysteries that lie beyond our everyday lives.]]></itunes:summary><itunes:duration>8582</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Coming People-Charles F. Dole</title><link>https://www.spreaker.com/episode/coming-people-charles-f-dole--73684882</link><description><![CDATA["Coming People" by Charles F. Dole explores the evolving nature of society and the human spirit, delving into themes of progress and the collective journey of humanity. This thought-provoking work invites listeners to reflect on the potential of individuals to shape the future, emphasizing the importance of hope and resilience in the face of challenges. As we navigate a rapidly changing world, the insights offered in this book resonate with contemporary struggles for social justice and personal growth. Dole's timeless perspective on the human experience encourages us to consider our role in the ongoing story of progress, making it a compelling listen for anyone interested in the dynamics of change and community.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73684882</guid><pubDate>Sun, 09 Aug 2026 09:03:52 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73684882/coming_people_charles_f_dole.mp3" length="89758861" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Coming People" by Charles F. Dole explores the evolving nature of society and the human spirit, delving into themes of progress and the collective journey of humanity. This thought-provoking work invites listeners to reflect on the potential of...</itunes:subtitle><itunes:summary><![CDATA["Coming People" by Charles F. Dole explores the evolving nature of society and the human spirit, delving into themes of progress and the collective journey of humanity. This thought-provoking work invites listeners to reflect on the potential of individuals to shape the future, emphasizing the importance of hope and resilience in the face of challenges. As we navigate a rapidly changing world, the insights offered in this book resonate with contemporary struggles for social justice and personal growth. Dole's timeless perspective on the human experience encourages us to consider our role in the ongoing story of progress, making it a compelling listen for anyone interested in the dynamics of change and community.]]></itunes:summary><itunes:duration>11209</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Canadian Scenery, Volume 1-Nathaniel Parker Willis</title><link>https://www.spreaker.com/episode/canadian-scenery-volume-1-nathaniel-parker-willis--73659428</link><description><![CDATA[Canadian Scenery, Volume 1 by Nathaniel Parker Willis invites listeners to explore the breathtaking landscapes and vivid imagery of Canada through the eyes of a masterful observer. This work captures the essence of the Canadian wilderness, celebrating its natural beauty and cultural significance. As we navigate a world increasingly disconnected from nature, Willis's eloquent descriptions remind us of the enduring power of the environment and its ability to inspire awe and reflection. His observations resonate today, encouraging a deeper appreciation for the landscapes that shape our identities and experiences. This volume serves as a timeless tribute to the beauty of the Canadian scenery that continues to captivate hearts and minds.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73659428</guid><pubDate>Sat, 08 Aug 2026 09:35:27 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73659428/canadian_scenery_volume_1_nathaniel_parker_willis.mp3" length="201200677" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>Canadian Scenery, Volume 1 by Nathaniel Parker Willis invites listeners to explore the breathtaking landscapes and vivid imagery of Canada through the eyes of a masterful observer. This work captures the essence of the Canadian wilderness, celebrating...</itunes:subtitle><itunes:summary><![CDATA[Canadian Scenery, Volume 1 by Nathaniel Parker Willis invites listeners to explore the breathtaking landscapes and vivid imagery of Canada through the eyes of a masterful observer. This work captures the essence of the Canadian wilderness, celebrating its natural beauty and cultural significance. As we navigate a world increasingly disconnected from nature, Willis's eloquent descriptions remind us of the enduring power of the environment and its ability to inspire awe and reflection. His observations resonate today, encouraging a deeper appreciation for the landscapes that shape our identities and experiences. This volume serves as a timeless tribute to the beauty of the Canadian scenery that continues to captivate hearts and minds.]]></itunes:summary><itunes:duration>25125</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Scientific American Supplement, No. 415, December 15, 1883-Various</title><link>https://www.spreaker.com/episode/scientific-american-supplement-no-415-december-15-1883-various--73635151</link><description><![CDATA["Scientific American Supplement, No. 415, December 15, 1883-Various" offers a fascinating glimpse into the scientific discourse of the late 19th century. This collection captures the spirit of inquiry and innovation that characterized the era, showcasing a range of topics that reflect the burgeoning field of science and its impact on society. The enduring themes of exploration and the pursuit of knowledge resonate deeply today, reminding us of the importance of scientific literacy and critical thinking in our modern world.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73635151</guid><pubDate>Fri, 07 Aug 2026 19:50:36 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73635151/scientific_american_supplement_no_415_december_15_1883_various.mp3" length="124581572" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Scientific American Supplement, No. 415, December 15, 1883-Various" offers a fascinating glimpse into the scientific discourse of the late 19th century. This collection captures the spirit of inquiry and innovation that characterized the era,...</itunes:subtitle><itunes:summary><![CDATA["Scientific American Supplement, No. 415, December 15, 1883-Various" offers a fascinating glimpse into the scientific discourse of the late 19th century. This collection captures the spirit of inquiry and innovation that characterized the era, showcasing a range of topics that reflect the burgeoning field of science and its impact on society. The enduring themes of exploration and the pursuit of knowledge resonate deeply today, reminding us of the importance of scientific literacy and critical thinking in our modern world.]]></itunes:summary><itunes:duration>15557</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Gay-Neck The Story of a Pigeon-Dhan Gopal Mukerji</title><link>https://www.spreaker.com/episode/gay-neck-the-story-of-a-pigeon-dhan-gopal-mukerji--73591585</link><description><![CDATA["Gay-Neck: The Story of a Pigeon" by Dhan Gopal Mukerji is a captivating tale that explores the bond between a young boy and his beloved pigeon, Gay-Neck. This poignant narrative delves into themes of loyalty, courage, and the profound connections that can exist between humans and animals. As Gay-Neck embarks on a journey filled with challenges and adventures, listeners are reminded of the timeless values of friendship and resilience. The story's enduring appeal lies in its celebration of the spirit of companionship and the bravery that often arises in the face of adversity, making it a meaningful experience for audiences today.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73591585</guid><pubDate>Fri, 07 Aug 2026 03:17:29 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73591585/21440_gay_neck_the_story_of_a_pigeon_dhan_gopal_mukerji.mp3" length="118755093" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Gay-Neck: The Story of a Pigeon" by Dhan Gopal Mukerji is a captivating tale that explores the bond between a young boy and his beloved pigeon, Gay-Neck. This poignant narrative delves into themes of loyalty, courage, and the profound connections...</itunes:subtitle><itunes:summary><![CDATA["Gay-Neck: The Story of a Pigeon" by Dhan Gopal Mukerji is a captivating tale that explores the bond between a young boy and his beloved pigeon, Gay-Neck. This poignant narrative delves into themes of loyalty, courage, and the profound connections that can exist between humans and animals. As Gay-Neck embarks on a journey filled with challenges and adventures, listeners are reminded of the timeless values of friendship and resilience. The story's enduring appeal lies in its celebration of the spirit of companionship and the bravery that often arises in the face of adversity, making it a meaningful experience for audiences today.]]></itunes:summary><itunes:duration>14830</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Radioactive Substances - Marie Curie</title><link>https://www.spreaker.com/episode/radioactive-substances-marie-curie--73281851</link><description><![CDATA["Radioactive Substances" by Marie Curie delves into the groundbreaking exploration of radioactivity, a phenomenon that has transformed our understanding of atomic science. Curie's meticulous research and scientific observations laid the foundation for future advancements in both physics and medicine, making her work a timeless reference in the field. The themes of curiosity, perseverance, and the quest for knowledge resonate strongly today, as we continue to grapple with the implications of scientific discovery and its impact on society. This audiobook serves not only as a historical account of Curie's contributions but also as an inspiration for those who seek to push the boundaries of human understanding in the pursuit of progress.]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/73281851</guid><pubDate>Fri, 31 Jul 2026 12:46:12 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/73281851/radioactive_substances_marie_curie.mp3" length="142341238" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>"Radioactive Substances" by Marie Curie delves into the groundbreaking exploration of radioactivity, a phenomenon that has transformed our understanding of atomic science. Curie's meticulous research and scientific observations laid the foundation for...</itunes:subtitle><itunes:summary><![CDATA["Radioactive Substances" by Marie Curie delves into the groundbreaking exploration of radioactivity, a phenomenon that has transformed our understanding of atomic science. Curie's meticulous research and scientific observations laid the foundation for future advancements in both physics and medicine, making her work a timeless reference in the field. The themes of curiosity, perseverance, and the quest for knowledge resonate strongly today, as we continue to grapple with the implications of scientific discovery and its impact on society. This audiobook serves not only as a historical account of Curie's contributions but also as an inspiration for those who seek to push the boundaries of human understanding in the pursuit of progress.]]></itunes:summary><itunes:duration>17775</itunes:duration><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item><item><title>Treatise on Light - Christiaan Huygens</title><link>https://www.spreaker.com/episode/treatise-on-light-christiaan-huygens--71858788</link><description><![CDATA[Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface (refraction and reflection). A large portion of the book is devoted to the double refraction occurring in Iceland chrystal, and all drawn conclusions are proved geometrically. Christiaan Huygens (1629 - 1695) was a prominent physicist and astronomer. His main discoveries are the centrifugal force, collision laws for bodies and the argument that light consists of waves. He was a contemporary of Galilei and Descartes, and a member of the French Royal Society since 1663. (Summary by Availle)]]></description><guid isPermaLink="false">https://api.spreaker.com/episode/71858788</guid><pubDate>Mon, 04 May 2026 15:57:04 +0000</pubDate><enclosure url="https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/71858788/treatise_on_light_christiaan_huygens.mp3" length="136081906" type="audio/mpeg"/><itunes:author>Christiaan Huygens</itunes:author><itunes:subtitle>Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface...</itunes:subtitle><itunes:summary><![CDATA[Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface (refraction and reflection). A large portion of the book is devoted to the double refraction occurring in Iceland chrystal, and all drawn conclusions are proved geometrically. Christiaan Huygens (1629 - 1695) was a prominent physicist and astronomer. His main discoveries are the centrifugal force, collision laws for bodies and the argument that light consists of waves. He was a contemporary of Galilei and Descartes, and a member of the French Royal Society since 1663. (Summary by Availle)]]></itunes:summary><itunes:duration>17011</itunes:duration><itunes:keywords>astronomy,centrifugal,galilei,geometrically,huygens,light,opticks,refraction,treatise,velocity</itunes:keywords><itunes:explicit>false</itunes:explicit><itunes:image href="https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/78993a8db3578d7dc7ad7fa8f9c9de29.jpg"/><itunes:episodeType>full</itunes:episodeType></item></channel></rss>
