INDEX. 



J 79 



OiLroIf contains a new metal, 



Proust on siilphuretSj 208, 215 ; 

 186 on tinning, 3 13 



Ortfhf, 7i:nnvf. Ascent to the Publ'uati'jns. New, 365 



suuunit of, 189 Pjrites. Analyses of, 135,213 



Palladium discovered by Dr. 

 VVollaston, 89 



Paper. All incombustible, 2 43 

 Parallax, annuel^ ot the earth, 

 188 

 Patents. New, 95»37'* 



Pear ion (i)r. Grorgc) on the 

 use of sulphate of iron as 

 manure, 5- 



Peat ashis a manure, ^Z 



Pff/ on Galvanism, 279 



Peiululum first proposed for a 

 natuial measure by sir Chris- 

 topher Wren, 16S 

 Pframetes, a new genus of mam- 

 malia, 2S 

 Perkins's patent, 372 

 Peron on temperature of sea 

 water, 1:9 

 Petit'Tlouars on Danais, 3J 

 Vhospkorics promotes magnetism 

 in Iron, I 47 ; precipitates al- 

 kaline metallic solutions, i'!^'] \ 

 makes iron brittle, 219 

 Ptir;-!fum extracted from as- 

 plialtuin and co.il, I 51 

 /-'// coiil. On, 48, 147, 151, 203, 

 304 

 Pi-^mrvt. A new, 1 1 9 

 P'lf^i.u on tfie tea tree, 2^6 

 Pithing c ittlc. On, 67 

 Plumi. A new, 18S 

 Platina. New metals found in, 

 89, 90, 1S8 ; rendered mal- 

 leable, 175 

 Plymliys mineralogy of Shrop- 

 bhiie, 201, 304 

 Pneumatic medicine. On, 126, 

 128 

 Ptrta on reflecting cold from 

 a concave mirror, 173 

 PottJtoet. To prrserve, 117 

 Poetry. 0:i glazed, 3 I ;5 

 Printing or dyeing patent, yj 

 Priic 'jucfion:, ire. 87,18^, 365 



^dcklime. Effects of, on gun- 

 powder, 245 



RriwUnson's colour-mill, 1'6 

 Rtjining of gold and fdver. New 



process for, 125, 352 



Repulsion hctiveeii Jluids. The 



doctrine of, contested, 154 

 Resin from lac, 13, 17 



Rice. On the culture of, i 



Rider's patent, 374 



Roberiso7i's aerial voyage from 



Pctersburgh, 193 



Rob'ns'.ii on peat, 61 



Roxburgh on tlic culture of the 



sugar cane, 264 



Royal Society, 367 



Rust in c-jTU. On, 320 



Ryaji's patent, 372 



Sd/ety-valve. New, 254 



Sage on zinc, 242 ; on ami- 

 anthus, 243 

 Salts promote vegetation, bo 

 Screiv-/>r.ss. A new, 249 

 Sea. On lemperatiMe of, 129 

 Seed, stick, arul shell lac. On, I 2 

 Seeds. Patent for separating, 

 from straw, 95 

 S-lfimmo'atirm. Instance t)f, 26 

 Ships. Oa extinguishing acci- 

 dental fires in, 97 

 Sh'jrtir's patent, ^^ 

 Shropshire. Mineralogy of, 201, 



304 

 Shict ^l:ss. Patent for flattening, 



Sh-jes. Patent for fastening, 573 

 Siani. On the trade of, 22 



Silcw Airuiity of, for carbon, 

 8i 

 Silver. New ways of refining, 



SI tui^hUiinn cattle. On, 69 



Snails ab.urb oxygen, 191 



SjCirly 



