1946. Revised edition, reprint. 490 pages. No dust jacket. Brown cloth with gilt titles to spine. With illustrated frontispiece. Includes various diagrams. From the Engineering Science series. Pages have slight foxing, tanning and minor thumbing. Previous owner's inscription to front pastedown. Foxing more noticeable towards the start and end of the book. 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. Gilt is dulled and worn.