64M 



INDEX. 



Report of Auditors, 70. 



of the Meteorological Committee to 



the President and Council of the Royal 

 Society on the work done in the Me- 

 teorological Office since their appoint- 

 ment in 1866 to Dec. 31, 1875, 189. 



Reports from the ' Challenger,' 463. 



Repulsion, on, resulting from radiation : 

 Part III., 276 ; Part IV., 279. 



Residual charge, on the, of the Leyden 

 jar, 407. 



Reynolds (O.) on the force caused by the 

 communication of heat between a sur- 

 face and a gas, and on a new photo- 

 meter, 388. 



on the refraction of sound by the 



atmosphere, 164. 



Romanes (G. J.), preliminary observations 

 on the locomotor system of Medusas, 143. 



Rose (Sir Gr.), obituary notice of, hi. 



Rotation, an experiment on electro-mag- 

 netic, 403. 



Royal medal awarded to W. Crookes and 

 T. Oldham, 91, 93. 



Royston-Pigott (G. W.) on a new refracto- 

 meter for measuring the mean refractive 

 index of plates of glass and lenses by the 

 employment of Newton's rings, 393. 



Riicker (A. W.) and Thorpe (T. E.) on 

 the expansion of sea- water by heat, 

 159. 



Sarcophi/ton, on the anatomy of a species 

 of, 59. 



Schafer (E. A.), description of a mamma- 

 lian ovum in an early condition of 

 development, 399. 



Schuster (A.) on the nature of the force 

 producing the motion of a body exposed 

 to rays of heat and light, 391. 



Sclater-Booth (Rt. Hon. Gk), elected, 183; 

 admitted, 276. 



Sea, on determining the depth of the, 

 without the use of the sounding-line, 

 and on an attraction-meter, 317. 



Sea-water, on the expansion of, by heat, 



1.0 o. 



Selenium and tellurium, on the action of 



light on, 163. 

 Shanks (W.) on the number of figures in 



the period of each reciprocal of a prime 

 _ from 53,000 to 60.000, 392. 

 Siemens (C. W.) on determining the depth 



of the sea without the use of the 



sounding-line, and on an attraction- 

 meter, 317. 

 Skull, on the structure and development 



of the, in the Batrachia: Part II., 



136 

 Snakes, on the development and succession 



of the poison-fangs of, 259. 

 Solar spectrum, on reversed photographs 



of the, beyond the red, obtained on a 



collodion plate, 186. 



Sound, on the refraction of, by the atmo- 

 sphere, 164. 



Sounding-] ine, on determining the depth 

 of the sea without the use of the, 317. 



Southern Sea, preliminary report on 

 Crustacea observed during the cruise 

 of ELM.S. 'Challenger' in the, 387, 

 585. 



Spark, on the length of the, from a battery 

 of 600, 1200, 1800, and 2400 rod- 

 chloride-of-silver cells, and some phe- 

 nomena attending the discharge of 

 5640 cells, 167. 



Specific volumes of liquids, researches 

 upon the: Part II., 182; Part III., 

 298. 



Spinal nerves, on the development of the, 

 in Elasmobranch fishes, 135. 



Spottiswoocle (W.), an experiment on 

 electro-magnetic rotation, 403. 



Stokes (G. G.), letter from, to J. N. 

 Lockyer, 352. 



Stylaster, Millepora, and Pocillopora, on 

 the structure of species of the genera, 

 59. 



Sun-spots, on a secular variation in the 

 rainfall in connexion with the secular 

 variation in amount of, 379. 



Surface organisms examined on board 

 H.M.S. 'Challenger,' preliminary report 

 on some, 532. 



System, on the locomotor, of the Medusas, 

 143. 



Tahiti, on the structure of a species of 

 Millepora occurring at, 448. 



Tait (L.), preliminary note on the anatomy 

 of the umbilical cord, 417. 



Tellurium and selenium, on the action of 

 light on, 163. 



Theory of electrolysis, experimental con- 

 tributions to the, 308. 



of the solution of a system of simul- 

 taneous non-linear partial differential 

 equations of the first order, on the, 

 337. 



Thomson (C. W.), preliminary report to 

 the Hydrographer of the Admiralty on 

 some of the results of the cruise of 

 H.M.S. ' Challenger ' between Hawaii 

 and Valparaiso, 403, 463. 



, preliminary report to, on chemical 



and geological work done on board 

 H.M.S. ' Challenger,' 388, 593. 



, preliminary report to, on the true 



corals dredged by H.M.S. 'Challenger,' 

 in deep water, between Dec. 30, 1870, 

 and Aug. 31, 1875,387,544. 



• , preliminary report to, on Crustacea 



observed during the cruise of H.M.S. 

 'Challenger' in the Southern Sea, 387, 

 585. 



, preliminary report to, on observa- 

 tions made during the earlier part of 



