1929. No Edition Remarks. 349 pages. No dust jacket. Blue cloth with gilt lettering. Black and white diagrams, graphs and illustrations throughout. Minor foxing and tanning to pages. More prominent to text block edges, pastedowns and free endpapers. Pen inscription to front pastedown.Light cracking, creasing and staining to gutters; some looseness to binding but pages remain attached. Boards have minor corner bumping and edgewear with mild staining, tanning and scuffing overall. Spine has heavier tanning with soft crushing to ends. Lettering remains bright and clear. Book has a slight forward lean.