Cambridge: Cambridge University Press, 1948. 8vo., pp.vii,652, hardcover, silver lettering, b/w diagrams and illustrations; ownership autograph to front free endpaper, lightly toned, else internally clean, rubbed to extremities, else a very good copy in a good+ unclipped dust-jacket, with a few light marks, some rubbing and wear to spine, small area of loss to headband and chipping to tailband.