# Scientific American Supplement, No. 446, July 19, 1884

An audiobook by Various, read by LibriVox volunteers (4 h 22 min, English).

The Scientific American may be the oldest continuously published periodical in the United States, havinge 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 Pneumatic Malting, Improved Hay-Rope Machine, Automatic Fast Speed Telegraphy, and Tin in Canned Foods Our Servants, The Microbes - Summary by Larry Wilson

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