FIRST EDITION, 8vo, pp. [viii], xv, [i], 495,  + 2 folding plates. Numerous woodcut diagrams within the text. Contemporary dark calf, panelled in blind, edges sprinkled red. Toned, some spotting. Sometime rebacked in morocco, no front flyleaf, hinges neatly relined. Booklabel of Calgarth Park (see below) to front pastedown, occasional substantial annotations in pencil and ink.