London: The Locomotive Publishing Company Ltd, 1927. First Edition. Quarto (28cm). Cloth boards, titled in gilt on spine and front cover; ,-391pp; illus. Hint of fading to spine and a couple of spots of inocuous foxing to text block edges, else a tight, square copy, Very Good to Near Fine, lacking the dustwrapper.
Ahrons's major work, and a standard book on the subject, compiled and published posthumously from Ahrons' articles in The Engineer.