INDEX. 437 



National Inflitute, prizes propofed by the French, pages 95, %z6. 



proceedings of the French, ioc, 218, 328. 



Natural bijlory, late difcoveries in, 209. 



intelligence refuting to, 336* 



Ntcboljon, M r . P. on the mechanical power of the ■wedge, 316. 



Nieuwland, P. biographical memoirs of, 69. 



Niger, fome particulars refpecling the river, 202, 240. 



Oil paint, a cheap fobftitute for, 22. 



Oriental procefs for dyeing Turkey or Adrianople red, 4. 



Orang outang, Wurmb's description of the, 225. 



1 obfervations on Wurmb's defcription of the, 337. 



Painting, the antiquity and advantages of encauftic, 23, 141. 

 ■ the oldeft oil one in ekiftence, a lhort account of, 30. 



— — — — Requeno's procefs for encauftic, 406. 

 Pallas, Profcjfor, account of the procefs employed at Aftracan for 

 dyeing Turkey red, 4. 



■ ; on the irritability of fea fponges, 34. 



Paper, experiments to render it indeftruftible by fire, 89, 173. 



Paraguatan, on a new wood of that name proper for dyeing, 92. 



Paris, account of a model of, 222. 



Park's journey into the interior of Africa, 191, 235. 



Parhelia, or mock funs, feen at Niort, &c. 67, 429. 



■Perkins', Dr. difcovery of metallic tractors, 250. 



Phenomenon, on a fingular one called the fpectre of the broken, 232. 



Phyfiology, experiments, &c. in, 65,42;. 



Plants, on the fenfibility of, 305. 



Prize queftions, 95, 102, 103, 220, 323, 325, 326,424, 425. 



Prony on the comparative expanfive force of the fteam of water and 



of alcohol, 345, 

 Quadrupeds, extraft of a memoir on the fofTil bones of, 413. 



Red, the Turkey or Adrianople, procefs for dyeing, 4, 126. 



efle&s of mordants on, 274. 



Red lead of Siberia, a new metal found in the, 279,361. 

 Redjea, on a junction of the Mediterranean with the, 128. 

 Regnier, defcription of the dynanometer invented by, 339. 

 Requeno's procefs for encauftic painting, 406. 

 Roman National Inflitute, nomination of the members, IP4, 

 Rujb, Dr. on the iugar maple, 182. 



Sap, experiments on its riling in trees, note, 184. 



in vegeta'les, prize queftion concerning the, 424. 



Sapbies, a lhort account of xhem, 241 . 



Saturn, obfervations by Herfchel on, 60. 



Schroder, Prcfcjjor, defcription of his 26 feet telefcope, 1 13. 



Sego, a large city in Africa, ihort defcription of, 235. 



Senjibility cf plants, remarks on the, 305. 



2hea-tt>u~l)u,sjr tree latter, account of the, 238. 



Sbrittert 



