1959. Ninth impression. 159 pages. No dust jacket. Green cloth covered boards with silver gilt. Black and white diagrams throughout. Black and white portrait frontispiece. Pages and binding are presentable with no major defects. Minor issues present such as mild cracking, inscriptions, inserts, light foxing, tanning and thumb marking. Overall a good condition item. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning.