Verlag: Munn and Company, Inc., USA, 1935
Magazin / Zeitschrift Erstausgabe
Paperback. Zustand: Good. First Edition. 112 pages. Features: Use of cemented carbides in industry; The miniature camera; Zeta Aurigae - a close double star; Canalization of the Upper Mississippi River; Archaeologist's notebook; Making your own photomicrographic camera; Rubber plant experiments; Excavations by CWA workers under the Tennessee Valley Authority bring to light the contents of 40 Indian villages and mounds; Preventing fires at sea; The versatile papaya; Is the growing death rate from heart disease and cancer real or only apparent?; Progress in this age of science; Interesting brief note and photo of what may be the first grease cartridges and grease gun; and more. Coverfold partly open. Average wear. Unmarked. A worthy vintage copy.