1955. First Edition. 127 pages. No dust jacket. This is an ex-Library book. Red cloth covered boards with gilt. Black and white diagrams throughout. Book has been rebound by library, with expected inserts, stamps and inscriptions. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine. Gilt lettering to spine is slightly dulled.