INDEX. 



555 



Phenose, on the preparation and pro- 

 perties of, 452. 



Phosphorus, on white, 144; re- 

 searches on, 311. 



Physics, on molecular, 265. 



Planetary motion, on motion in a 

 circle and its relation to, 52. 



Polynomials, on a general property of 

 derived, 369. 



Pratt (Archdeacon) on the level of the 

 sea during the glacial epoch, 172, 

 532; on the fluid theory of the 

 earth, 193, 430. 



Pyrolusite, analyses of, 167. 



Radiation, on terrestrial, 510. 



Rankine (W. J. M.) on saturated va- 

 pours, 197, 199. 



Regelation, observations on, 119. 



Reusch (E.) on a gas-burner for 

 sounding large tubes, 401. 



Rose (Dr. E.) on the doctrine of co- 

 lour-disease, 85. 



Royal Society, proceedings of the, 

 149, 233, 3*16, 397, 475, 537. 



St. Elmo's fire, note on, 321. 



Salleron (M.) on a method of testing 

 mineral oils, 143. 



Saturation, on the doctrine of uniform 

 and constant, 283. 



Schrauf (A.) on the determination of 

 the refractive equivalent of the ele- 

 ments, 483. 



Schroeder van der Kolk (Dr. H. W.) 

 on gases, 124, 181. 



Schwendler (L.) on the galvanometer 

 resistance to be employed in test- 

 ing with Wheatstone's diagram, 

 364. 



Sea, on extraordinary agitations of 

 the, 45 ; on the level of the, during 

 the glacial epoch, 172, 201, 305, 

 323, 532. 



Secchi (Father) on the relation be- 

 tween the variation of sun-spots 

 and that of the amplitude of mag- 

 netic oscillation, 324. 



Sedgwick (Prof.) on the geology of 

 the valley of Dent, with some ac- 

 count of a destructive avalanche 

 which fell in 1752, 79. 



Selenium, on the coloration of glass 

 by, 84. 



Siemens (W.) on the unit of electrical 

 resistance, 325, 376. 



Silicon, on the forms of graphitoidal, 

 397. 



Soap-bubbles, on some properties of' 

 228. 



Sodium-ethyle, on the action of car- 

 bonic oxide on, 505. 



Solar spectrum, on the aqueous lines 

 of the, 503. 



Soret (M.) on the density of ozone, 

 82. 



Sound, on the influence of internal 

 friction in the air on the motion of, 

 551. 



Spectra of the metals, on the influ- 

 ence of the electro-negative ele- 

 ments upon the, 483 ; of the fixed 

 stars, on the, 405, 515 ; of the 

 nebulae, on the, 475, 523. 



Spectroscope, on the construction of 

 a, 110. 



Spectrum, on the aqueous lines of the 

 solar, 337. 



Sphere, on the motion of a small, 

 acted upon by the undulations of 

 an elastic fluid, 343. 



Stars, on the spectra of some of the 

 fixed, 405,515. 



Stefan (Prof.) on a new method of 

 measuring the lengths of luminous 

 waves, 550; on the influence of 

 internal friction in the air on the 

 motion of sound, 551. 



Stevelly (Prof. J.) on the composi- 

 tion of forces, 245, 404.* 



Stewart (B.) on the secular change of 

 magnetic dip, 235 ; on the decrease 

 of the actinic effect near the cir- 

 •cumference of the sun, 243 ; on the 

 specific gravity of mercury, 316; 

 on the aqueous lines of the solar 

 spectrum, 503. 



Sun, on the decrease of actinic effect 

 near the circumference of the, 243. 



Sun-spots, on the relation between 

 the variation of, and that of the 

 amplitude of magnetic oscillation, 

 324. 



Sylvester (Prof. J. J.), astronomical 

 prolusions by, 52; on the separation 

 of the roots of an algebraical equa- 

 tion, and on a new theorem, 214 ; 

 on periodical changes of orbit, with 

 a new theory of the analogues to 

 the Cartesian ovals in space, 287, 

 380. 



Thallium, on the crystalline forms of 

 some compounds of, 153. 



Thermometer, on the black-bulb, 191. 



