London: Royal Society of London, 1773, 1774. Quarter Leather. First Edition. , v-viii, 218, v-vii, 221-507,  pp. 8vo. Library binding, tan leather spine with gold embossed titling, scuffing and tears where call numbers have been removed. Interiors clean, ex-library stamp on title page, and occurring sporadically within. Numerous folding plates that illustrate articles. Pages were trimmed slightly when rebound. Very Good.
Franklin and company's proposal for protecting the magazines at Purfleet, Wilson's dissent, and the group's letter saying they stand by their original assertions. Lengthty report on Deluc's development of a new hygrometer that used mercury instead of alcohol as the indicator fluid. Deluc's two folding plate with two separate illustrations was engraved by Basire.
Also contains papers by numerous other authors on a variety of subjects including medicine, natural history, physics, mathematics and archaeology, illustrated with numerous plates.