1938. First Edition. 239 pages. No dust jacket. Brown cloth. Black and white illustrated and photographic plates throughout. Pull-out diagrams to rear free endpaper. Binding remains firm. Pages and plates have light tanning and foxing throughout. Tears to edges of diagrams, picture remains unaffected. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Dent to top edge of rear board.