I N D E X. 



535 



tartaric acid and its products, l)u- 



tyro-acetic acid, 141. 



Niobic acid, on the occurrence of, in 



the North American columbite,o61 . 



Nitric acid, on the analysis of bodies 



containing, 42(5. 

 Numbers, on a machine for calcula- 

 ting, l/l- 

 Oxygen, on the oxidizing power of, 

 when disengaged by means of vol- 

 taic electricity, 334. 



Oxypicric acid, 148. 



Paget (Dr. G. E.) on some cases of 

 morbid rhythmical movements, 1 29. 



Patterson's (R.) Introduction to Zo- 

 ology, noticed, 57. 



Peligot (M.) on the composition of 

 Bohemian glass, 147. 



Peter's comet, notice of, 61. 



Phosphate from urine, on the prepa- 

 ration of the ammoniaco-magnesian, 

 462. 



Phosphorocalcite, analysis of, 69. 



Phosphorus, on the excretion of, by 

 the kidneys in an unoxidized state, 

 253 ; on the amount of, in various 

 agricultural crops, 330. 



Plaster of Paris, on, 464. 



Playfair (Dr. Lyon) on the maximum 

 density of water, 41. 



Plessy (M.) on plaster of Paris, 464. 



Polarized light, on the pliEenomena 

 exhibited by, 465. 



Porrett (R.) on the chemical compo- 

 sition of gun-cotton, 273 ; on the 

 existence of a new vej'eto-alkah in 

 gun-cotton, 409. 



Poumarede (M.) on the reduction of 

 the persalts of iron by zinc, 149. 



Powell's (Rev. Prof.) note to a former 

 paper on the thcoiy of the aberra- 

 tion of light, 9.3 ; on luminous rings 

 round shadows, 137. 



Problems, on the solution of certain, 

 2S. 



Pypers (M.) on an easy method of pre- 

 piiriug iodide of j)otassium, 146. 



Quaternions, on, 45S. 



Quiua, compo-sition of, 29.3. 



Uammclsberg (I\l. C.) onchromateof 

 chromium, 22.3. 



Uansoine (T.) on the composition and 

 explosion of gun-cotton, 1. 



Hays, on a peculiar electrical organ 

 found in, 47. 



Rein.seii (.M.) on the ignition of brass 

 wire in the vajmur of alcohol, 14.3. 



Robin (M. le Dr. Ch.) on a peculiar 



organ founil in the rays, 47. 

 Rochleder (M.) on the formation of 



glycerine, 146. 

 Ronalds (Dr. E.) on the extractive 

 material of urine, and on the excre- 

 tion of sulphur and phosphorus by 

 the kidneys in an unoxidized state, 

 253. 

 (F.) on photogra])hic self-regis- 

 tering meteorological and magnet- 

 ical instruments, 127. 

 Rose (H.) on the behaviour of metallic 

 zinc towards solutions of mercury, 

 290 ; on the acid contained in the 

 North American columbite, 360 ; 

 on the examination of the ashes of 

 organic bodies, 369. 

 Rowney (T.) on the Bohemian glass 

 as found in the combustion tubes 

 employed in organic analysis, 421. 

 Ro\al Astronomical Society, proceed- 

 ings of the, 60, 130, 207. 

 Roval Society, proceedings of the, 57, 



i25, 196. 

 Sabine (Lieut. -Col. E.) on the lunar 

 atmospheric tide at St. I-Ielena,206. 

 Salts, action of bromine upon, 525. 

 Schumacher (Prof.) on the reappear- 

 ance of Astrrea, 133. 

 SelenahUne, observations on, 470. 

 Sharp (A.), relics of the mechanical 



productions of, 25. 

 Silicates containing chlorine, sulphu- 

 ric and carbonic acid, 52S. 

 Silurian rocks in Cornwall, on the dis- 

 covery of, 336. 

 Smith (Dr. R. A.) on the air and water 



of towns, 478. 

 Snow, on the formation of cyhncbical 



masses of, in Orkney, 301. 

 Soils, on the solvent action of drain- 

 age-water on, 30. 

 Sorby (H. C.) on the amount of sul- 

 phur and phosphorus in various 

 agricultural crops, .330. 

 Southern (J.) on the density, latent 



lieat and elasticity of steam, 113. 

 Spectrum, on the analysis of the, by 



absorption, 461. 

 Spencer (II.) on the form of the earth 

 us no proof of original fluidity, 1 94. 

 S(juares, on a generalization of a 

 theorcni of I'iulcr in reference to the 

 jiroducts of the sums of, 424. 

 Stannates, observations on the, 380. 

 Stars, olisi'rvations on double, 64 ; 



