494 INDEX. 



Reflectors^ earthenware, notice of, 170. 



Refraction^ double, of minerals, 168. 



Respiration, influence of the eighth pair of nerves on the organs 

 of, illustrated by experiments and remarks, 292-314. 



Rhubarb, analysis of, 288-292. 



Robertson, (Antony, Esq.) evidence of, (with remarks) in the 

 cause of Severn and Co. against the Imperial Insurance 

 Company, 325, 326. 



Robiquetj (M.) observations of on Aroma, 109-117. 



Ro]/al Socicti/, proceedings of, 378-387 — analysis of its trans- 

 actions, 393-399 — list of its present officers, 380. 



Salt, (Mr.) copy of inscription by, at Alexandria, 7 — notice of 

 his researches in Egypt, 475, 476. 



Salt, beneficial effects of, in promoting the growth of vegetables, 

 56-63 — in rendering fruit-trees or esculent plants unfit for the 

 habitation of worms or insects, 53-68 — and also in destroying 

 them, 68, 69 — as well as weeds and other noxious vegetables, 

 70, 71 — a remedy for mildew in wheat, 446 — a preventive of 

 dry rot, 448 — premiums offered for experiments on the effects 

 of salt as a manure, 72 — muriate of potash found in salt, 181, 

 182 — found in two volcanoes of Tartary, 197. 



iSaZ^s, action of on the chloride of gold, 118 — and of soluble 

 and insoluble salifiable bases, 119-121. 



Scientific books, analysis of, 393-411. 



Scotland, illustrations of the mineralogy of, 207. 



Scutellaria Lateriflora, a remedy for hydrophobia, 194. 



Secret writing. See Writing. 



Seppings, (Sir Robert) on a new principle of constructing mer- 

 chant-ships, 393-395. 



Severn and Co. (Messrs.) observations on the chemical part of 

 the evidence given upon the trial of the action by, against 

 the Imperial Insurance Company, 316-354. 



Ships, (merchant) new principle of constructing, 393-395 — dry 

 rot in, prevented by salt, 448. 



Silver, on the reduction of the chloride of, 453. 



Sinumbra lamp, description of, 101-103. 



Size of the heavenly bodies, observations on the apparent 

 changes in, 9-25. 



Snow, red, early appearance of, 199 — experiments on. 395, 396 

 — perpetual, regions of, 200. 



Snowdon, measurement of, 397. 



Societies f proceedings of : — The Royal Society of London, 378- 

 387— of the Academy of Sciences at Paris, 388-392. 



South, (James Esq.) corrections by, in right ascension of thirty- 

 six principal fixed stars to every day in the year, 427-444. 



Spade husbandry/, successful instance of, 447. 



Spalding, (Dr.) on remedy for hydrophobia, 194. 



