1940. 383 pages. No dust jacket. Red cloth and gilt titles to front and spine. Introduction by Sir Robert Mayer. Pages and binding are presentable with no major defects. Minor issues present such as slight general tanning, with heavier tanning and foxing to endpapers. Ex libris plate on front pastedown. Overall a good condition item. Upper text block edge dusty. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Several faint scratches to front board, and some dark liquid droplet marks to upper part of rear board. Spine ends are a little crushed. Gilt is bright.