WHAT'S IN THE ROCKET? ... [cover title]. N.p: Scientific American, 1934. Folio, single sheet folded to make four pages. Offprint from SCIENTIFIC AMERICAN, July 1934. A 3-page illustrated popular article by the president of the American Rocket Society about amateur rocket societies and a summary of recent experiments with rocket motors and propellants. Old horizontal mailing folds, a fine copy. (#163928).