SCIENTIFIC AMERICAN, New York, August 21, 1915  This issue contains many displayable ads including a 2 page spread for a Chalmers Six-40 Motorcar, Prince Albert Pipe Tobacco,  and Firestone Tires - all fullpage.  Addition content  (with images) includes:  "The Largest Hydraulic Motor", "Thimble Shoal Lighthouse", "...the "Building of New York's Great Piers", "Farming in Paelestine", and much more.  This issue is in very good condition.