[ [2] “Suspicions about some hidden qualities of the Air,” ibid. p. 77.

[ [3] A Free Inquiry into the Vulgar Notion of Nature; Prefatory remarks.

[ [4] Experiments and Observations on Different Kinds of Air, vol. ii. By Joseph Priestley, LL.D., F.R.S. Second edition (1776), p. 29.

[ [5] Chemical Treatise on Air and Fire (1777), § 3.

[ [6] Loc. cit. p. 46.

[ [7] Loc. cit. p. 55.

[ [8] Loc. cit. p. 94.

[ [9] Loc. cit. p. 102.

[ [10] The accurate translation of Scheele’s Treatise publishedby the Alembic Club (William F. Clay, 1894) has been made use of here.

[ [11] § 4.