In the series Pitman’s Common Commodities. Co-author Harold J Plant. Undated. Grey-green cloth-covered boards, black titles to front board and spine, 132 pages (including index) followed by pages of publisher’s catalogue. With 28 illustrations from photographs, including several of workers at work. Barely octavo in size (approximately 7.4 inches high). Condition: A little wear to the boards but overall clean, sound and bright.