1924. No edition remarks. 149 pages. No dust jacket. This is an ex-Library book. Red cloth covered boards with gilt. Black and white photographs and diagrams. Black and white frontispiece. Rough cut edges to textblock. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Some cracking to gutters. Binding slightly loose. Boards have heavy shelf wear with bumping and fraying to corners and crushing, fraying and tearing to spine ends and edges. All surfaces tanned and sunned, particularly spine. Some additional mild marks and staining. Gilt lettering to spine is slightly dulled.