New York and London, McGraw-Hill Book Company, Inc., 1928. 8vo. Black cloth covered boards with rubbed gilt title to spine. Wear to exterior includes minor bumping and fraying to spine ends and edges, minor bumping to corners, and minor soiling and rubbing to boards. Writing and drawing, mostly in pencil to end papers and paste downs. Else is clean and bright with illustrations and diagrams throughout. Index, 236 pages.