1779. First Edition. hardcover. By Mr. Ramsden, Optician; Communicated by Joseph Banks. Two large folding plates. Also contains: Fontana, Abbe. Account of the Airs extracted from different kinds of Waters; with Thoughts on the Salubrity of Air at different Places. Swift, William. Account of Some Experiments in Electricity. 2 large folding plates. pp. 419-462. 8vo, modern cloth-backed bds., leather label. n.p., 1779. very good(+).
Ramsden work is "...on the double-image principle, one by reflection, the other by refraction..." DNB XVI, p. 709. "Fontana's model of the eudiometer (for measuring the salubrity of air)..." DSB V, p. 57. Philosophical Transactions, vol. LXIX.