SCIENTIFIC AMERICAN, New York, July 5, 1913  The most interesting article is nearly a full page on: "The Genealogy of the Motorcycle" which includes 18 illustrations of the earliest of motorcycles. The cover has a nice color illustration showing construction workers using a riveting tool on iron beams for a skyscraper under construction. 
Other items include "Submarine Photography - A New Art" "Teaching Soldiers How to Shoot"  "Novel Uses of Compressed Air" "Fuel Production in the United States" and more.
Complete in 24 pages, library stamp at the top of the cover, a small non-archival mend border region, but otherwise in the very nice condition. The motorcycle content is very nice.