Scientific American Supplement, No. 508, September 26, 1885

Scientific American Supplement, No. 508, published on September 26, 1885, is a periodical featuring a collection of articles on various scientific topics including chemistry, engineering, electricity, geology, and natural history. This edition discusses advancements such as the Cowles Electric Smelting Process, the flow of liquids in porous rocks, and significant geological sites like the Grotto of Gargas. It serves as a historical resource reflecting the scientific inquiries and technological innovations of the late 19th century.