1939. 2nd edition 2nd impression. 352 pages. No dust jacket. Red cloth. Includes various diagrams. Pages have slight foxing, tanning and minor thumbing. Previous owner's inscription to front endpaper and pastedown. Boards have some edge wear, with moderate bumping and fraying to corners, while spine ends are slightly crushed and frayed. Rather scratched, rubbed and marked overall. A few liquid droplet marks to rear. Book has a moderate backward lean.