1936. First Edition. 391 pages. No dust jacket. Red cloth. Includes photographic plates. Includes various diagrams. Pages have slight foxing, tanning and minor thumbing. Plates are clean with minor thumbing and foxing. Large squashed insect to front endpaper. Rear hinge cracked with exposed netting, however text block remains firm. A few dog-eared corners. Red smudge mark to rear pastedown. Boards have some edge wear, with moderate bumping and fraying to corners, while spine ends are slightly crushed and frayed. A bit scratched, rubbed and marked overall. Spine has some small water drop marks.