1731, (6) viii (4) 376 pp., 19 engraved plates by S. Gribelin (Vol. I); 1733, xxii, (26), 361, (23) pp. (Vol. II). 8vo (19.5x12.5cm). Interior browned, Vol. II with the leaf before the title announcing the Royal Society's authorisation of publication, some dampstaining to the end. Ownership inscription H.