Original May 1921 Scientific American Monthly magazine. 3 ½ page, Infinitely Small and Infinitely Great about the limits of measurement.  2 page illustrated Mutation and Evolution. 3 page illustrated Evolution of Golf Balls. Other illustrations and topics of the day. ~8.5in x 11.5in. ~90pages. In protective sleeve. If you are interested in old books, newspapers, documents and paper memorabilia, please check out others items I have for bids. We do combine, when possible, like items, to save on shipping(12-19-21).