INDEX. 3*7 



Pyrometer pieces fufed by the London Philofophical Society, 262. 

 Pyromucous, pyrotartareous, and pyroligneous acids, on the identity 

 of, with acetous acid, 40. 



Rats and mice, Mr. Taylor's recipe for deftroying, 1 18. 

 Rays, invifible, of the fun, Dr. Herfchel on, 9, 16, 126, 2$$. 

 Refradory fuhfiances, experiments to fufe, 2 J, 262, 322. 

 Rrfrangibility of inlnftble rays of 'the fun, Dr. Herfchel on, 9. 

 Royal Society of London, tranfaCtions of the, l3 1, 283, 378. 

 Rubie.f inttrefting experiments on the fuiibility of, 27, 262. 



Sapphires, attempts to fufe, by means of oxygen sjaF, 2c. 



Sauniers's (Dr.) treatife on mineral iv.iiers, account of, So. 



Saujfure (the fon) on influence of foil on vegetables, 184. 



Sea, on the luminous appearance of the, 97. 



Seignette's fdt, on the diicovery of, 166. 



Shadows, refult of experiments on, 288. 



Ship, leak, in, (topped by applying rice, 378. 



Sight, method to reftore, in certain cafes, 148. 



Smutty irheat, to convert, into good flour, 192. 



Society for the Encouragement of Aits, notice by the, 284. 



Soil, influence of, on conilituent parts of vegetables, 184. 



Solar rays which occafton heat. Dr. Herfchel on, 16, 126, 253. 



Spinel ru'y, attempt to fufe the, 262. 



Summers of l8co and 1792 compared, 286. 



Swallows, on the fubmciiion ot, 107. 



Sivijferland, cautions to thofe who may vifit the mountains of # 



S3> «°9- 

 Syrian fifk plant, on the cultivation and ufe of, 149. 



Tarlrite of foda, on the difcovery of, 166. 



Tcrreflrial rajs that occafiori heat, experiments on, 16, 126, 253. 



Tetanus cured by the cold bath, 3S1. 



cured by eledtricitv, 382.. 



Tides, examination of St. Pierre's hypothecs of the, 134, 267. 

 Tilhch on heat or caloric, jo, no, 21 1. 

 Topazes fufed by the London Philofophical Society, 26. 

 Tranfparent bodirs, obfervations on the colours of thin, 179. 

 Travels, Damberger's, through Africa, 240, 353. 



Vaccine inoculation, on the progrefs of, 305, 308, 3C9. 

 Van Marum's electrical experiments, 193, 318. 

 Vaf.lli-Edtidi on animal eleftricity, 171. 

 Vauguclin's analyfis of mellite or honey-llone, 329. 



— — gadolinite, 3' 6. 



Veritable acid found in ih ■ mineral kingdom, 192. 

 Vegetables, influence of foil on conilituent parts o^, 184. 



•, electrical experiments upon, 195, 314 



Vegetation, experiments on, with artificial i'ght, l88> 

 Venetian method of colouring, thought 8" on the, 1. 

 Virmflions fufed by heat ex'ited by oxygen gas, 263. 



4 Wavtf 



