INDEX. 



543 



Nickel, on Villari's critical point in, 



469. 

 Nitrogen, on the preparation of pure, 



Ohm's law, on a necessary modifica- 

 tion of, 65. 



Oxygen, on the effect of the re- 

 placement of, by sulphur on the 

 boiling- and melting-points of 

 compounds, 458. 



Pembrey (M. S.), comparative ex- 

 periments with the dry- and wet- 

 bulb psychrometer and an im- 

 proved chemical hygrometer, 525. 



Perry (Prof. J.) on liquid friction, 

 441. 



Pickering (S. U.) on the diffusion of 

 substances in solution, 127. 



Pole (Dr. W.) on colour-blindness, 

 52. 



Power (F. D.) on the Pambula gold- 

 deposits, 76. 



Pressure, on the relation of volta 

 electromotive force to, 97. 



Psychrometer, comparative experi- 

 ments with the dry- and wet-bulb, 

 and an improved chemical hygro- 

 meter, 525. 



Radiant energy, on, 113. 



Radiation by rarefied gases under the 

 influence of electric discharge, on 

 the intensity of, 502. 



Raisin (Miss C. A.) on the variolite 

 of the Lleyn, 312. 



Refraction of rays of great wave- 

 length in rock-salt, sylvite, and 

 fluorite, on the, 35. 



, on some recent determinations 



of molecular, 204, 270. 



Reid (C.) on a fossiliferous Pleisto- 

 cene deposit at Stonp, 469. 



Rigollot (H.) on a chemical actino- 

 meter, 77. 



Rimington (E. C), experiments in 

 electric and magnetic fields, con- 

 stant and varying, 68 ; on lumi- 

 nous discharges in electrodeless 

 vacuum-tubes, 506. 



Roberts (T.) on the geology of the 

 district west of Caermarthen, 467. 



Rock, on the fusion constants of 

 igneous, 173, 296. 



Rock-salt, on the refraction of rays 

 of great wave-length in, 35. 



Rowland (Prof. H. A.) on gratings 

 in theory and practice, 397. 



Rubens (II.) on the refraction of 

 rays of great wave-length in rock- 

 salt, sylvite, and fluorite, 35. 



Rudski (M. P.) on the flow of water 

 in a straight pipe, 439. 



Rydberg (Dr. J. R.) on a certain 

 asymmetry ■ in Prof. Rowland's 

 concave gratings, 190. 



Salt-solutions, on hydrolysis in aque- 

 ous, 365. 



Sanford (F.) on a necessary modifi- 

 cation of Ohm's law, 65. 



Shells, on the finite bending of thin, 

 496. 



Shields (Dr. J.) on hydrolysis in 

 aqueous salt-solutions, 365. 



Shrubsole (O. A.) on the plateau- 

 gravel south of Reading, 468. 



Smith (F. J.) on high resistances 

 used in connexion with the D'Ar- 

 sonval galvanometer, 210. 



Smith (W.), experiments in electric 

 and magnetic fields, constant and 

 varying, 68. 



Snow (B. W.) on the refraction of 

 rays of great wave-length in rock- 

 salt, sylvite, and fluorite, 35. 



Solid, on the motion of a perforated, 

 in liquid, 338, 490. 



Solution, on the diffusion of sub- 

 stances in, 127. 



Sound-waves, on plane and spherical, 

 of finite amplitude, 317. 



Squier (Lieut. G. O.) on electro- 

 chemical effects due to magnetiza- 

 tion, 473. 



Starr (J. E.) on the specific heat of 

 liquid ammonia, 393. 



Stoney (Dr. G. J.) on a possible 

 source of the energy required for 

 the life of bacilli, 389. 



Sulphur, on the effect of the re- 

 placement of oxygen by, on the 

 boiling- and melting-points of 

 compounds, 458. 



Suinpner (Dr. W. E.) on the dif- 

 fusion of light, 81. 



Sutherland (W.) on the laws of 

 molecular force, 211. 



Swinton (A. A. C.) on high 

 frequency electric discharges. 

 142. 



Sylvite, on the refraction of rays of 

 great wave-length in, 43. 



Teall (J. J. II.) on some coast- 

 sections at the Lizard, 466 ; on a 



