Published by Caxton Publishing, London, 1913 (date of preface). Maroon cloth boards, gilt lettering to spines, black lettering to front boards. Diagranatic illustration of engine to front board. Each 10ins x 7.5ins, each has a coloured diagram with overlays to the front pastedown. Vol 1: ix, (i), 213pp plus 8pp plates (and the frontis). Also 266 figures within the text. Vol 2: ix, (i), 213pp plus 8pp plates (and the frontis). Also 266 figures within the text. Vol 3 : ix, (i), 216pp plus 7pp plates (and the frontis). Also 250 figures within the text. Volume three contains the index. All three volumes VG. Nb combined weight 4kg, would require extra postage.