620 



Rotifera, dioecious character of the, 66. 



Royal Medal awarded to Sir John Rich- 

 ardson, 257; W. Thomson, 258. 



Rumford Medal awarded to M. Pasteur, 

 254. 



Sabine (Major-Gen. E.) on periodical 

 laws discoverable in the mean effects 

 of the larger magnetic disturbances, 

 No. III., 40. 



on the lunar-diurnal magnetic varia- 

 tion at Toronto, 216. 



on the evidence of the existence of 



the decennial inequality in the solar- 

 diurnal variations, and its non-existence 

 in the lunar-diurnal variation of the 

 magnetic declination at Hobarton, 314. 



on what the Colonial Magnetic Ob- 

 servatories have accomplished, 396. 



on hourly observations of the mag- 

 netic declination, made at Point Bar- 

 Tow in 1852, 1853 and 1854, 610. 



Salmonidee, vitality of the ova of the, 27. 



Scelidotherium leptocephalum, Owen, 312. 



Sea saw-dust of the Pacific, 393. 



Sea- water, specific gravity of, in the north- 

 ern and southern hemispheres, 291 ; 

 existence of silver in, 292. 



Secchi (P. A.), explanatory remarks on a 

 drawing of the lunar spot "Copernicus," 

 presented to the Royal Society, 72. 



, description of the Observatory of 



the Collegio Romano at Rome, 83. 



elected foreign member, 229. 



Serpentines of Canada and their asso- 

 ciated rocks, 423. 



Sharpe (D.), obituary notice of, 275. 



Silica, researches on, 440. 



Silicates of the alkalies, part which they 

 play in the metamorphism of rocks, 458. 



Silver, existence of, in sea-water, 292 ; 

 comparative degree of affinity of iodine, 

 bromine and chlorine for, 496. 



Sloth, large extinct terrestrial, 312. 



Smith (Dr. E.) on the quantity of air 

 inspired throughout the day and night, 

 and under the influence of exercise, 

 food, &c., 451. 



Smyth (C. P.). report of proceedings of 

 the astronomical expedition to Teneriffe 

 in 1857,528. 



Solar spectrum, action of certain parts of 

 the, upon the iris, 233. 



Solids, thermal effects of longitudinal 

 compression of, 564. 



Special General Meeting, June 3rd, 1856, 

 on the removal of the Society to Bur- 

 lington House, 141. 



Sphygmoscope, description of a new, 18. 



Spinal cord, as a leader for sensibility and 

 voluntary movements, 591. 



Spongiada, anatomy and physiology of 

 the, 573. 



Standard of length, new national, and of 

 its principal copies, 530. 



Stereoscopic images, anomalies in the 

 illusion of, 104. 



Stewart (B.) on an instrument for regis- 

 tering changes of temperature, 195. 



Stokes (G. G.) on the effect of the rota- 

 tion and ellipticity of the earth in 

 modifying the numerical results of the 

 Harton Colliery experiment, 59. 



Strychnia, detection of, by the formation 

 of iodo-strychnia, 149 ; action of, on 

 the animal economy, 204. 



Sturm (J. C. F.), obituary notice of, 260. 



Sturmian functions for equations of the 

 second, third, fourth and fifth de- 

 grees, 325. 



Substances, conductive powers of various, 

 535. 



Sulphuric acid, action of, on the nitriles 

 and amides, 158; action of, upon anisic 

 and salicylic acids, 494. 



Telegraph wires, peristaltic induction in 

 symmetrical systems of submarine, 126. 



Temperature, on an instrument for re- 

 gistering changes of, 195. 



Teneriffe, astronomical expedition to, in 

 1857, 528. 



Thermal effects of fluids in motion, 41, 

 178 ; of stretching solid bodies, 355. 



Thermo-electricity of ferruginous metals, 

 355. 



Thialdine, contributions towards the his- 

 tory of, 491. 



Thomson (J.) on the plasticity of ice, as 

 manifested in glaciers, 455. 



Thomson (W.) on the thermal effects of 

 fluids in motion, 41, 178, 556. 



, elements of a mathematical theory 



of elasticity, 85. 



on peristaltic induction of electric 



currents, 121. 



, dynamical illustrations of the mag- 

 netic and the helicoidal rotatory effects 

 of transparent bodies on polarized light, 

 150. 



, Royal Medal awarded to,' 258. 



'On practical methods for rapid signal- 

 ling by the electric telegraph, 299, 303. 



on the electro-dynamic qualities of 



metals : effects of magnetization on 

 the electric conductivity of nickel and 

 of iron, 546. 



on the electric conductivity of 



commercial copper of various kinds, 550. 



on the alterations of temperature 



accompanying changes of pressure in 

 fluids, 564. 



