In the series Pitman’s Common Commodities. Undated. Grey-green cloth-covered boards, black titles to front board and spine, 127 pages (including index) followed by pages of publisher’s catalogue. 23 illustrations: frontispiece from photographs, the rest diagrams of machinery. Barely octavo in size (approximately 7.4 inches high). Condition: A little rubbing to the boards, overall a very nice copy.