1938. No edition remarks. 254 pages. No dust jacket. Green cloth covered boards. Fully illustrated with diagrams and photographs. Pages remain clear with minimal tanning and foxing. Heavier tanning and foxing to text block edges. Plates are bright and clear. Binding is shaky but pages are attached. Ex Libris plate to front pastedown. Boards have heavy edge-wear with bumping to corners, crushing to spine ends and rub wear all over. Front board and spine are bleached and dust marked. Mild crushing to spine ends. Book has a slight forward lean.