INDEX. 



653 



Potter, Mr., on the quantity of light re- 

 flected by metallic specula, 162. 



Potash, mode of obtaining, from felspar, 

 184. 



Poisson, M., on the equilibrium of fluids, 

 595. 



on the roots of transcen- 

 dental equations, 596. 



Prevost's, M., experiments on an appear- 

 ance of decomposition of white light, 

 by the motion of the body which re- 

 flects it, 535. 



Purkinje's Essay on the Subjective Phe- 

 nomena of Vision, analysis of, 102. 



Pyrometer, account of a new register, by 

 Mr. J.F. Daniell, 338. 



Pyrophosphoric acid, and the pyrophos- 

 phates, remarks upon, 167. 



Q. 



QUESNEVII;LE'SJ Fils, mode of preparing 

 lithia, 386. 



.. process for the crys- 



tallization of bismuth, 393. 



Quetelet's, M., experiments on coloured 

 bands produced by plane mirrors, 165. 



Quicksilver employed in reducing ores, 

 145. 



mines in New Spain, 150. 



R. 



RADISH-ROOT, remarks upon the struc- 

 ture of the, G38. 



Rainbows, remarks upon the darkness be- 

 tween the primary and secondary, 28 1 . 



Razors, new mode of setting, 13. 



Rennie, Mr., on the peculiar habits of 

 cleanliness in some animals, and par- 

 ticularly the grub of the glow-worm, 

 15 description of its cleaning instru- 

 ment, 17 proved to be carnivorous, 

 19 remarks upon its light, 20 

 cleanliness of the cat, 23. 



on the contrivances of some 



animals to secure warmth, 496. 



Renwick, Professor, on the earliest 

 epoch of Kgyptian chronology, 458 

 remarks upon the rising of the 

 Nile, 460 earliest settlement of a 

 colony in Egypt, 462 remarks upon 

 the chronology of Josephus, 469. 



Retina, its central vessels rendered 

 visible, 110 explanation of this phe- 

 nomenon, 111 its more minute ves- 

 sels rendered visible, ibid. its central 

 point apparently free from vessels, 

 112 its insensibility to feebly illu- 

 minated objects when continuously 

 presented, 534. 



Ribers and Donne, MM., on the glo- 

 bules in the humours of the eye, 185. 



baro- 



Rich, Dr., on the use of nitrogen in re- 

 spiration, 186. 



Ritchie's, Mr., description and applica- 

 tion of a torsion galvanometer, 29 

 experiments showing its great deli- 

 cacy, 32 remarks upon the construc- 

 tion of a battery for electro-magnetic 

 purposes, 35- conducting power of 

 wires, 36. 



Ritchie, Mr., on the elasticity of torsion 

 in the threads of glass, 556. 



Rive, M. de la, on the relative action of 

 sulphuric acid and zinc, 388. 



Robinson's improved mountain 

 meter, 555. 



Robiquet on a new metallic dye, 628. 



Rock-salt in Armenia, 386. 



Rose, M., on the atomic weight of tita- 

 nium, 175. 



- on two ores of tellurium from 



the Altai mountains, 399. 



H., on the compounds of ammo- 

 nia with anhydrous salts, 620. 



Royal Academy of Sciences of the In- 

 stitute of France, Vol. IX., extracts 

 from the, 59 5. 



Royal Institution, proceedings of the, 

 547. 



S. 



SABINE'S, Captain, experiments with the 

 pendulum, 338 experiments for the 

 correction of variation of temperature, 

 ibid. 



Salicine, powers of, as a febrifuge, 177. 



remarks upon, by MM. Pe- 



louze and Jules Gay Lussac, 396. 



process for preparing, 397. 



use of, in intermittent fevers, 



566. 

 Salt, on the application of common, in 



cases of animal poisons, 189. 

 Sankey, Mr., on the fabulous history of 



Greece, 57 remarks upon the origin 



of the fable of Ceres, 59 of Proteus, 



60 observations upon the Argonau- 



tic expedition, 62 fable of Perseus, 



63 Hermes, 65 Danaus, 68. 

 Sap, remarks upon the motion of, in 



plants, 90. 



Saturn's ring, peculiar appearance of, 376. 

 Schlegel, Dr., on the salivary glands of 



serpents, 591. 

 Scorpions, observations upon the eyes 



of, 153. 

 j Scrope, Mr. G. P., on the ripple marks 



and tracts of certain animals in the 



forest marble, 538. 

 Sea, phosphorescence of the, in the gulf 



of St. Lawrence, 194. 

 Seeds, germination of, on the surface of 



mercury, 637. 



