1912. No Edition Stated. 126 pages. No dust jacket. This is an ex-Library book. Blue cloth with gilt titles to spine. Expected library inserts, stamps and inscriptions. Includes various diagrams. With illustrated frontispiece. Pages have slight foxing, tanning and minor thumbing. A few dog-eared corners. Gutters somewhat cracked with some exposed netting. Pencil drawing to rear endpaper. Boards have heavy edge wear, with intense bumping and fraying to corners, while spine ends are very crushed and frayed. Scratched, rubbed and marked overall. Some water staining to front and rear. Gilt is dulled and worn.