1 Of colours vide pag 693 Of colours vide pag 69Of colours vide pag 69The Newton Project Knowledge Graph2020-10-08Journal
19 Gold & silver melted into a lumpe & dissolved by Aqua fortis the pouder of gold falling to the bottome appeares not yellow but black though neither the gold silver nor Aquafortis be so, & silver rubbed on other bodys colours them black.
20 Most bodys precipitated from the liquor into which they were dissolved are white, but not all.
21 The scrapeings of black horne lookes white.
22 Sulphur adust is not the cause of blacknesse as Chimists hold, for common sulphur be either melted or sublimed turnes onely red or yellow. And the plant Camphire though very inflamable & consequently sulphureous by burning turnes to noe colour but white &c. But then what causeth blackness in sulphur adust.