1937. Sixteenth Impression. 495 pages. No dust jacket. Red cloth covered boards with gilt. Black and white photographs and diagrams. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Previous owner's name to front pastedown. Boards have heavy shelf wear with bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine. Gilt lettering to spine is slightly dulled. Some additional marks and staining to surfaces.