1915. No Edition Stated. 186 pages. No dust jacket. This is an ex-Library book. Brown cloth. Expected library inserts, stamps and inscriptions. Contains black and white diagrams throughout with 2 folded tables. Pages are lightly tanned with mild foxing throughout. Slight cracking to gutters on occasion, exposing netting. Binding remains firm with all pages attached. Paper remnants with scuffing to a few pages. Some pages have been repaired to gutters. Folded tabled are in good condition with minor creasing. Boards have noticeable edge wear with corner bumping. Mild tanning to spine and edges with some crushing to spine ends. Library sticker taped to spine bottom edge with minor paper remnants across spine. Faint black marks overall. Book has a slight forward lean.