Third edition, revised. 184 pages. Black and red jacket over red cloth. Includes photographic plates. Includes various diagrams. Acknowledgements slip tipped in opposite preface. Pages have slight foxing, tanning and minor thumbing. Endpapers have strips of tanning caused by jacket. Previous owner's inscription to front endpaper. A few dog-eared corners. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Spine is slightly sunned. Unclipped jacket has heavy edgewear with some areas of loss, heavy tears, chips and creasing. Jacket is rather rubbed and marked overall. Brown marks to rear.