C 3 
R. 
Rabbits . Experiments made on, with the poifon of Ticunas, p.170. 173. 173.187. 
193. Experiments on the fciatic nerves of, p. 198. Experiments with the water 
of Lauro^-Cerafus on, p. 213. 
Rain . Mean quantity 'of what falls annually at Mancheffer, p. 348. Regifter of the, 
at Lyndon, in 1779, p. 474. 
Refractors. Caution to thofe who ufe Mr. Dollond’s, of three feet and a half, in mea- 
suring the mountains in the moon, p. 319. 
Rum, Its effects when mixed with the American poifon, p. 182. 
S. 
Salts. Peculiar property of metallic, how tried, p. 38. 
Sea-air. An apparatus for examining it, p. 338. Examined by the nitrous tell, and 
found to be more wholefome than the air at land, p. 337. 363. Proved by expe- 
riment to be better than that of land, p. 373. 
Seg tier , J. A. His experiments on a new animal acid from the fat of oxen, p. 109. 
Senegal. Account of, p. 478. 
Senegambia. Account of the weather there during the prevalence of a fatal putrid dis- 
order, p. 478. Putrid diforder there defcribed, p. 488. 
Series. Way of affigning the roots of cubic equations by infinite, p.413. 
Serpents. Experiments on them with the poifon of Ticunas, p. 188. 
Sexes. Remarks on the refemblance of the, in Secondary properties, p. 329. 
Ships 4 Method of removing thofe driven on fhore, or damaged in their bottoms, to dis- 
tant places, for the purpofe of repairing them, p. 100. 
Silk. Improvement propofed in dying it, p. 331. 
Skin. The principal part fufceptible of the variolous ftimulus, p. 133. 
Small-pox. A woman who had it during pregnancy, and communicated the fame dif- 
order to the foetus. Quere, whether adults, who are Said to efcape it, may not have 
had it in the womb, p. 130. Its true characteristic, p. 133. Difference between 
it and the chicken-pox in its appearances, p. 134. Whether the fkin is the only 
part of the body expofed to this Stimulus, p. 133. How it may be communicated to 
the child in the womb, p. 136. Cafes adduced in Support of its being communicable 
in this manner, ibid. Why this does not happen oftener, p. 141. 
Smith, Dr. Correspondence of a miff obferved by Mr. Cockin, with Some appearances 
obServed by him, p. 160. 
Snow. Experiments made with thermometers in, p, 453. 437. 463. 
Stan 
