xii, 320pp, black and white diagrams throughout. Pictorial cloth-covered boards. 8vo. Sun-faded spine; rubbed corners and spine ends, paper torn through at bottom corners; shelf number label taped to spine. Lender's rubber stamps to top and fore text block edges, all edges tanning. Lender's stamps, security device and markings on endpapers, title and copyright pages. Otherwise internally neat, clean, bright and tight.