Erratum

XV. Observations on the Change of some of the proximate Principles of Vegetables into Bitumen; with analytical Experiments on a peculiar Substance which is found with the Bovey Coal. By Charles Hatchett, Esq. F. R. S. p. 385 XVI. On two Metals, found in the black Powder remaining after the Solution of Platina. By Smithson Tennant, Esq. F. R. S. p. 411 XVII. On a new Metal, found in crude Platina. By William Hyde Wollaston, M. D. F. R. S. p. 419 ERRATUM In Part I. page 145, line 20, for 9199, read 9919. The three Plates in the second Part are numbered VII, VIII, IX, instead of VI, VII, VIII.