In the series Pitman’s Common Commodities. Undated; Preface dated 1929. Grey-green cloth-covered boards, black titles to front board and spine, 124 pages (including index) followed by pages of publisher’s catalogue. With illustrations: coloured frontispiece, several illustations from photographs, mostly of machinery, line diagrams in run of text. Barely octavo in size (approximately 7.4 inches high).. Condition: A little rubbing to the boards, a few light pencil ticks to the margins, overall a very nice copy.