1938. Reprinted. 120 pages. No dust jacket. Brown cloth covered boards. Black and white diagrams throughout. Pages are heavily tanned and foxed throughout. Cracking to front hinge with netting exposed. Binding loose. Some page corners folded. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine. Book has slight forward lean.