Tenth Edition. 149 pages. Dust jacket over blue paper. Preface to this edition dated 1942. Contains black and white illustrations and photographs throughout. Clean pages with mild tanning and foxing throughout. Tightly bound with faint thumb-marking throughout. Previous owner's inscription to front pastedown and endpaper. Boards have light shelf-wear with corner bumping. Mild crushing to spine ends. Book has forward lean. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Moderate tanning to spine. Heavy rubbing and marking all over.