24 CATALOGUE OF NEWTON PAPERS. 



pp. 140 sqq., further experiments on "the net" which seems to 

 contain iron and copper, and others of a similar kind. On p. 149 is 

 the date, Friday, May 23. 



p. 150, experiments on the spirit of zinc, Apr. 26, 1686. 



pp. 151 to 158, experiments on some alloys of copper, antimony 

 and iron, and continued on p. 267. 



pp. 159 to 193, extracts from Boyle on the medical virtues of 

 saline and other preparations. 



pp. 194 to 206, blank; p. 207, extracts from Boyle on volatile salts 

 of animal and vegetable substances. 



pp. 209 223, extracts from Starkey's Pyrotechny asserted on 

 alkalies. 



pp. 224 to 242, blank, except some headings. 



pp. 243 4, some extracts from "Secrets Revealed" and other 

 alchemical works. 



pp. 245 to 260, blank, except heading. 



p. 261, some references to alchemical works, pp. 262 4, blank. 



p. 265, recipe for ether, and its uses in medicine. 



p. 266, some recipes for medicines. 



pp. 267, 8, continuation of experiments from p. 158. On this 

 page is mentioned a liquor which dissolves the tinctures out of gold, 

 silver, &c. and leaves only a white calx but no directions for pre- 

 paring it. Further experiments. 



pp. 269 283, on regulus of antimony and alloys ; similar in 

 character to the former : rest of book blank, except 3 pages at 

 end, where is a list of prices of some chemicals in 1687 and again in 

 1693, and some notes of sublimation of vitriol with salammoniac. 



