Scientific American Supplement, No. 664, September 22, 1888
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 Iron Sailing Ships, Coal Tar as Fuel for Steam Boilers, Pepsin, A Chinese Imperial Cemetery, and Subterraneous Flora and Fauna. - Summary by Larry Wilson