Note 106 — ZINC.

Pott refers to Lawson’s Dissert. de Nihilo, and quotes some words from it; but I cannot find it; nor am I surprised at this, as it was not known to Dr. Watson.—See Chemical Essays, iv. p. 34. Pryce, in Mineral. Cornub., p. 49, says, “The late Dr. J. Lawson, observing that the flowers of lapis calaminaris were the same as those of zinc, and that its effects on copper were also the same with that semi-metal, never remitted his endeavours till he found the method of separating pure zinc from that ore.” The same account is given in the supplement to Chambers’s Dictionary, 1753, art. calm. and zinc; and in Campbell’s Political Survey of Britain, ii. p. 35. The latter however adds, that Lawson died too early to derive any benefit from his discovery.