1950. No Edition Stated. 327 pages. No dust jacket. This is an ex-Library book. Berkey Volume. Brown cloth with gilt lettering. Both hinges cracked with netting visible, thus the boards are slack. Pencil marking to pages on occasion. Notable tanning to endpapers and page edges. Some fold out diagrams partially detached. Ex-library with usual stamps, inserts and markings. Moderate wear and bumping to spine, board edges and corners, with splitting to spine ends and corners. Notable tanning to spine, with scuffing and marking to boards. Dewy code to spine.