Published by Macmillan Company in New York 1937
FIRST EDITION 8vo. red clothbound hardback. 149pp. with b/w illustrations and fold out diagrams by W. J. McElroy and the author. Previous owner's small ink inscription to inside front cover. Soiling and foxing to endpapers as well as light foxing throughout. Light soiling to cloth covers and light wear to top and base of spine. A VERY GOOD COPY.