39$ 



t N D £ X. 



Medicine. Yeast employed suc- 

 cessfully ns, $o ; oxymuriatic 

 acid, 55 ; hydro-.izoticgas,247 

 Men uration of timber. On, 2 J 3 

 Merselurg. Longitude of, 14 

 Meteorology, 15, 96, 212,29s, 

 296,308,394. 

 Michaux the botanist. Death 

 of, 95 



Miche'otti on action of -caloric 

 on vitality, 3 



Miner aloghal collection at the 

 Royal Institution, 283 



Mineralogy. Premiums in, 105 

 Mirror of Ptoiomy Eu 'getes. 

 On the, 1 9, 232 



Mirrors of large size made by 

 the antients, 242, 345 



Moll' rsten's paten t, 393 



Mountains. Vegetation on, 2t,8 

 Musbet on affinity of carbon, 

 earths and iron, 41, 137, 27$, 



339 



New Holland. Extent of, 10 



Nickel. To purify, 5 1 



Nitrous ether. New preparation 



of, 274 



Ochroit, a new earth, 95 



Opera glasses. Patent for, 307 

 Optical invention of the Esqui- 

 maux, 345 

 Optics. Knowledge of the an- 

 tients in, 66, I 76, 344 ; Pcolo- 

 my's mirror, 179, 232; exper. 

 with concave mirrors, 182; 

 with lenses, 182; a lens an- 

 swers the purpose of a tele- 

 scope, 183; object glasses, 

 184 ; reflecting telescope, 188 

 Ornilholtes. On, 263 

 Osteology, 350 

 O.xygen gas. Experiments wit h , 

 on minerals, 90 



Pallas (Professor), reported 

 dead, but alive aid well, 305 



Paper. On bleaching, 55 



Parkinson s work on extraneous 

 fossils, .82 



Patents. List of, 307, 393 



Pepys's analysis of Shetland irtftf 

 ore, 86 ; of iron pyrites, 8(5 



Perdu, Mont, journey to sum- 

 mit of, 364 



Petenburgh Imperial Academy, 



92 



Petcrsburgh Academy of Sci- 

 ences, 2S8, 386 



Phillips's analysis of pyrites, 87; 

 of antiinonial lead ore, 89 ; 

 of a micaceous substance, 89 



Platina. Fourcroy and Vau- 

 quelin on, t 17. Anew metal 

 discovered in, 29, 118 



Polite Arts. Premiums in, 108 



Population oi England and Wales, 



197 ; of Scotland and Ireland, 



200 



Porto's knowledge in optics, 



'85 



Portbouse's patent, 393 



Prague Royal Society of Sciences* 

 208 

 Press for forcing, cutting, &c. 

 Patent for, 307 



Prize qu est ions, 291, 38c, 387 

 Prosperin the arstonomer. Death 

 of, 18 



Ptoiomy Euergetes. On the mir- 

 ror of, 179, 232 

 publications, New, 200, 207, 

 282, 288, 289 

 Pyrites. Analysis of, 86, 87 

 Pyth goras s method of predict- 

 ing earthquakes, 294 



Rammd on basaltes, 58 



Ramond's journey to summit of 

 Mon; J'erdu, 364 



Rattlesnakes. On fascinating 

 power of, 379 



Rays from the sun. On kinds 

 and velocity of, 309 



Razors. Patent for, 307 



Refecting telescope. Discovery 

 or the, 188 



Reviewer's letter to Dr.Thorn- 

 ton, 39 



Rhinoceros. Osteological de- 

 scription of, 3)~o 

 Ricard, 



