492 



.INDEX 



Occullations, (lunar) table of the places of certain stars that 

 are liable to, 145-147 — table of the logarithms of the cor- 

 rections in seconds, to be applied with the proper signs of 

 the sines, 148-151 — occultations for the different places of 

 the moon's node, 152-158 — computation for a visible occul- 

 tation, 161-166. 



OdourSy theory of the origin of, 116. 



Olbtrs, (Professor) Essay of, on the easiest and most conve- 

 nient method of calculating the orbit of a comet from obser- 

 vations, 416-426. 



Onions, beneficial effects of salt in the culture of, 60-68. 



Ophihalmiaj Indian remedy for, 193. 



Optics, prize-question in, 168, account of an optical deception, 

 282, 283. 



Oxygenated Water, efficacy of, in restoring white in pictures, 

 168, 169. 



Oxymuriatic Salts, accelerate and increase the growth of vege- 

 tables, 59. 



Paintings, process for restoring the white in, 168, 169. 



Parallax, on the calculation of, for a spheroid, 412, 413. 



Paris, population of, 202. 



Parker's (Mr.) improved lamp described, 101-103. 



Parkes (Samuel, Esq.) on the progress of horticulture, 52-55 — 

 on the beneficial effects of salt, in promoting the health and 

 growth of vegetables, 56-63 — in rendering fruit-trees and 

 esculent plants unfit for the food or habitation of worms or 

 insects, 63-68— and also in destroying them, 68-70--as well 

 as weeds and other noxious vegetables, 70, 71 — Minute of 

 the evidence in the cause of Severn and Co. versus the Im- 

 perial Insurance Company, 327-329 — observations thereon, 

 329, 330— his abstract of that case, 317-320— and remarks 

 on the chemical evidence then given, 321-326 — 330-352 — 

 description of an apparatus for boiling sugar, 353, 354. 



Parry, (Capt.) account of the voyage of, to the polar regions, 

 350-361. 



Pavnn, (Don Jose) on the native country of the potato, 25-27 



Pelletier, (M.) Facts and experiments byji relative to gold, 117- 

 123 — chemical researches of, in conjunction with Monsieur 

 Caventou, on Cinchona, 388-392. 



Perkins (Jacob, Esq.) on the compressibility of water, 399. 



Peruvian Bark, substitute for, 194 — chemical researches on, 



, 388-392. 



Philip, (Dr,) Strictures on his theory of the nervous system, 269- 

 282. 



rhillips (Richard, Esq.) Evidence of, with remarks, m the cause 

 of Severn and Co. against the Imperial Insurance Company, 

 343-345, 35 J. 



