INDEX. 



567 



of turpentine, formation of formic acid 

 in, 236. 



Opianic acid, preparation of, 449. 



Optic axes, on the dispersion of the, 293. 



Optical constants of tourmaline, dioptase, 

 and anatase, 277. 



Ortigosa (V.) on nicotin, 19 ; on the 

 composition of conia, 414. 



Otto (M.) on distinguishing zinc from 

 manganese, 412. 



Owen (Prof. R.) on the fossil remains of 

 six species of marine turtles, 370. 



Oxichloric acid, on the preparation of, 

 157. 



Oxygen, new process for preparing, 42. 



Palladium and platinum, on the com- 

 pounds of, 50. 



Parabola, on a property of the, 190, 219. 



Parnell (E. A.) on the equilibrium of the 

 temperature of bodies in contact,381. 



Pascal's mystic hexagram, 37. 



Pearce (J. C.) on the mouths of ammo- 

 nites, 546. 



Peligot (M.) on the compounds of sugar 

 with bases, 451. 



Pepsin, on the composition of, 491. 



Persoz (M.) on the action of chromic 

 acid on volatile oils, 17. 



Phillips (J.) on shells and corals in aeon- 

 glomerate at Malvern, 288. 



Phillips (Mr.) on a fatal accident by light- 

 ning, 404. 



Photography, on facts connected with, 

 348, 409. 



Piesse (S.) observations on brewing, 317. 



Plants, on the existence of sulphur in, 

 74 ; action of salts on, 76 ; fossil, 

 occurrence of in the plastic clav, 

 546. 



Plates, on the colours of thin, 208. 



Porrett (R.) on a curious formation of 

 Prussian blue, 384. 



Posselt (M.) on the preparation of ferro- 

 cyanic acid, 325. 



Potash and chromium, on a new oxalate 

 of, 197, 201. 



Powell (Prof. B.) on the theory of the 

 dispersion of light, 122, 217. 



Quina and cinchonia, on the preparation 

 of, 171. 



Quinoiline, preparation of, 449. 



Rammelsberg (Dr.) on the hvposulphites, 

 279. 



Rees (J., jun.) on general formula for 

 eliminating the weights of mixed bases, 

 188. 



Refraction, on the law of double, 407- 



Reizet (M.) on the determination of ni- 

 trogen in organic analyses, 412. 



Repidolite, analysis of, 76. , 



Richter (J. B.) on the scientific labours 

 of, 81. 



Roberts (M.) on a new form of battery, 



311. 

 Rochleder (M.) on the action of hydrate 



of potassa on hydrobenzamide, 18. 

 Royal Astronomical Society, proceedings 



of the, 56, 397, 477,510; anniversary 



of the, 510. 

 Royal Irish Academy, proceedings of the, 



64, 228, 389, 532. 

 Royal Society, proceedings of the, 50, 



220. 

 Rose (G.) on the molybdate of lead, 73. 

 Rose (H.) on the analysis of native alu- 



minates, 78 ; on the action of water 



on sulphurets and haloid salts, 285. 

 Rothman (R. W.) on the mass of Venus, 



529. 

 Salt steppe south of Orenburg, observa- 

 tions on the, 357. 

 Santini (M.) on Bremicker's comet, 59 ; 



catalogue of 1677 stars, 60. 

 Schubert (M.) on the preparation of pure 



potash and soda, 324. 

 Schulze (M.) on a new method of ascer- 

 taining the quantity of phosphoric acid, 



379. 

 Schweitzer (Dr. E. G.) on the analysis of 



the chalk of the Brighton cliffs, 379. 

 Sedgwick (Rev. A.) on the stratified 



rocks inferior to the old red sandstone, 



141. 

 Sharpe (D.) on the geology of the south 



of Westmoreland, 555. 

 Sheepshanks (Rev. R.) on Mr. Snow's 



observations of Venus and the star 



A. S. C. 423, 398. 

 Shells in a conglomerate at Malvern, 288. 

 Smee (A.) on the voltaic circuit, with 



formulae for ascertaining its power, 248. 

 Solar rays, on the extinction of the, 223. 

 Specific heat and conducting power of 



building materials, 318. 

 Stars, on an instrument for observing 



right ascensions and declinations of, 



477. 

 Steam, electricity of nascent, 151. 

 Stearophanic acid and salts, composition 



of, 161. 

 Stigmaria-clay of Pennsylvania, 306. 

 Stokes (G. G.) on the rectilinear motion 



of fluids, 297, 423. 

 Strickland (H. E.) on the occurrence of 



the Bristol bone-bed in the lower lias 



near Tewkesbury, 540. 

 Sugar, on the compounds of, with bases, 



451. 

 Sulphocyanurets, on the, 280. 

 Sulphur, on a new acid of, 19 ; on the ex- 

 istence of, in plants, 74. 

 Surfaces, on some new properties of, 64. 

 Sylvester (Prof. J. J.) on the dialytic me- 

 thod of elimination, 534. 



