The Scientific American may be the oldest continuously published periodical in the United States, having launched its first publication in 1845. It has been a mainstay of popular science with in-depth articles across a broad spectrum of scientific fields. In this supplement are short articles ranging through such topics as The Temperature of the Solar Surface, Dr. Koch on the Cholera, The Cay Monument at Uxmal, and a long article on Modern Locomotive Practice, and one on Malaria. - Summary by Larry Wilson