1941. No edition remarks. 384 pages. Illustrated dust jacket over green cloth boards with gilt lettering to spine. Part of 'University of Knowledge Wonder Books'. Numerous black and white photographic illustrations throughout. Binding a little shaky. Minor dog eared corners to back pages. Couple of cracked gutters. Pages and photos remain bright and clear with minimal tanning. Heavier tanning to pastedowns and endpapers. Boards have mild edge wear with slight rubbing to surfaces. Piece of back board along top edge torn off. Gilt lettering is darkened a little by slight tanning to spine. Unclipped jacket has heavy edge wear with areas of loss to head of spine, heavy chips, tears and creasing mainly to top edge and spine. Heavy tanning to spine; more moderate across covers.