SCIENTIFIC AMERICAN, N. Y., Aug. 21, 1920 Nice, full front cover photo in three colors: "The Largest Of Its Kind: 350 Ton Crane at Philadelphia Navy Yard", which contains details and additional photos on an inside page. Other coverage includes: "Is There a Coal Shortage", "'Miss America,' built and owned by G.A. Wood...", "Record Weather", and two graphics showing why radium is so expensive.
The issue is complete in 16 pages, has a bit of light dirtiness & some minor fold rubbing. There's a small ink library stamp in the photo as well - otherwise good.