1942. First edition eighth impression. 312 pages. No dust jacket. This is an ex-Library book. Green cloth covered boards with gilt. Black and white photographs and diagrams. Ex library copy with associated labels, inserts, stamps and annotations. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding slightly loose. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Some mild marks and staining to surfaces.