INDEX. 



551 



Osann (M.) on gas-batteries, and on 

 the preparation of hydriodic and 

 hydro broniic acids by the galvanic 

 method, 317. 



Ozone, on the nature of, 503. 



Paterson's ( J . ) Calculus of Operations, 

 noticed, 60. 



Pendulum experiment, mathematical 

 theory of M. Foucault's, 331 . 



Phenacite, notice respecting, 142, 378. 



Phillips (R.) on frictional electricity, 

 36. 



Phosphorus, on the equivalent of, 

 399. 



Photographic images, on the produc- 

 tion of instantaneous, 73- 



Plants, on the green colouring matter 

 of, 398. 



Pliicker (M.) on the electro-magnetic 

 motor of Fessel, 155. 



Pollock (Sir F.), on a proof that every 

 number is composed of four square 

 numbers, or less, 304. 



Potato, en the amylum grains of the, 

 277- 



Powell (Rev. B.) on the analogies of 

 light and heat, 495. 



Problem in combinatorial analysis, on 

 a, 349. 



Pseudoscope, description of the, 151, 

 516. 



Quaternions, on continued fractions 

 in, 371. 



Quinine, on the optical properties of 

 a newly discovered salt of, 161. 



Ragona-Scina (Prof.) on the longi- 

 tudinal lines of the solar spectrum, 

 347. . 



Ramchundra's Treatise on Problems 

 of Maxima and Minima, 148. 



Reflecting instruments, on improve- 

 ments in, 71. 



Retina, on a mode of reviving dor- 

 mant impressions on the, 435. 



Riecken (M.) on the production of 

 cyanide of potassium, 399. 



Riess (P.) on electric currents of the 

 first and higher orders, 173. 



Rohrs (J. H.) on the oscillations of 

 suspension-bridges, 316. 



Royal Institution of Great Britain, 

 proceedings of the, 311, 473, 495. 



Royal Society, proceedings of the, 67, 

 149, 233, 304, 379, 470. 



Royal Society of Edinburgh, pro- 

 ceedings of the, 489. 



Rubian and its products of decompo- 

 sition, observations on, 213, 354. 



Rubiretine, properties and composi- 

 tion of, 364. 



Safety-lamp, on an improved miner's, 

 238. 



Salrnonidse, observations on the ova 

 of the, 384. 



Savory (W.) on the structure and con- 

 nexion of the valves of the human 

 heart, 304. 



Schlagintweit (Dr. II.) on the optical 

 phenomena of theatmosphere, 1,92. 



Schrotter (Prof.) on the equivalent of 

 phosphorus, 399. 



Schunck (E.) on rubian and its pro- 

 ducts of decomposition, 213, 354. 



Seguin (M. D. M.) on the accidental 

 colours which result from looking 

 at white objects, 77- 



Selenium, on the allotropy of, 546. 



Sharpe (D.) on the arrangement of 

 the fohation and cleavage of the 

 rocks of the north of Scotland, 388. 



Silicates, on the classification of the, 

 and their allied compounds, 270. 



Silhman (B., jun.) on M. Gillard's 

 light for illumination obtained from 

 the burning of hydrogen, 152; on 

 the present condition of Vesuvius, 

 156. 



Smyth (Prof. P.) on some improve- 

 ments in reflecting instruments, 7 1 • 



Solar spectrum, on the longitudinal 

 hnes of the, 347. 



Sphene and epidote, notice respect- 

 ing, 142. 



Spottiswoode (W.) on a problem in 

 combinatorial analysis, 349. 



Stereoscopes, description of several 

 new and simple, 16, 31, 149, 245, 

 397, 478, 504. 



Stokes (Prof.) on the composition 

 and resolution of streams of polar- 

 ized light from different sources, 

 316. 



Sulphur, on the crystallization of, 154. 



Sulphur deposits at Swaszowiee and 

 Radoboj, on the, 157. 



Sun, extraordinary spots on the, 7^ ; 

 on the late total eclipse of the, 232. 



Suspension bridges, on the oscillations 

 of, 316. 



Svanberg (M.) on rnonothermic elec- 

 tricity, 81. 



Sylvester (J. J.) on a remarkable 



