1944. First Edition. 390 pages. No dust jacket. This is an ex-Library book. Blue cloth covered boards. Black and white and colour diagrams. Ex library copy with associated labels, inserts, stamps and annotations. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have heavy shelf wear with bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine.