INDEX. 



501 



President, letter to the, from A. Wurtz, 

 148. 



from the Foreign Office, 1. 



address of, 40. 



Prime numbers and their powers, sums 



of reciprocals of (Merrifield), 4. 

 Prince of Wales admitted, 380. 

 Proboscidian mammal, fossil, tusk of an 



extinct (Owen), 448. 

 Pyridine series, action of ethylene 



chlorhydrin upon the bases of the 



(Wurtz), 448. 



Quinoline, action of ethylene chlorhydrin 

 upon the bases of (Wurtz) 448. 



Radiant heat, on the constituent of the 

 atmosphere which absorbs (Hill), 216, 

 435. 



Rayleigh (Lord), experiments to deter- 

 mine the value of the British Associ- 

 ation unit of resistance in absolute 

 measure, 397. 



Reciprocals of the prime numbers and of 

 their powers, sums of the series of 

 the (Merrifield), 4. 



Refraction of plane polarised light at the 

 surface of a uniaxal crystal (Grlaze- 

 brook), 30. 



Reinsch (P. F.) on a new mineral found 

 in the Island of Cyprus, 119. 



Report of auditors, 39. 



of Kew Committee, 80. 



Reptilian remains in the coal formation 

 of Nova Scotia, exploration of erect 

 trees containing (Dawson), 254. 



Reversal of the spectrum of cyanogen, 

 note on the (Liveing and Dewar), 3. 



Ringworm, the fungus of (Thin), 234. 



Roberts (Dr. W.), letter from, to the 

 Secretary of Royal Society, 147. 



Rodents, comparative structure of the 

 brain in (Lewis), 15. 



Rodwell (Gr. F.) on the coefficients of 

 contraction and expansion of heat of 

 the iodide of silver, Agl, the iodide of 

 copper, Cu. 2 I 2 , and of five alloys of. 

 these iodides, 143. 



Rolleston (Professor), obituary notice of, 

 xxiv. 



Russell (W. H. L.) on certain definite 

 integrals. No. 10, 211. 



on certain geometrical the- 

 orems. No. 1, 211. 



" Salmon disease," pathology of the 

 epidemic known as (Huxley), 381. 



Salts of a base containing chromium and 

 urea (Sell), 267. 



of silver, effects of the spectrum 



on the haloid (Abney), 164. 



Samuelson (Bernhard) admitted, 103. 



Sanders (A.), contributions to the 



anatomy of the central nervous system 



in vertebrate animals. Sub-section I. 



Teleostei. Appendix. On the brain of 



the Mormyridae, 400. 

 Sanderson (J. B.) on the electromotive 



properties of the leaf of Dioneea in the 



excited and unexcited states, 148. 

 Secretary of Royal Society, letter to, 



from Dr. W. Roberts, 147- 

 Sedgwick (A.) on certain points in the 



anatomy of Chiton, 121. 

 Seismic experiments, on (Milne and 



Gray), 139. 

 Sell (W. J.) on a series of salts of a base 



containing chromium and urea. No. 1, 



267. 



Siemens (C. W.) on the conservation of 



solar energy, 389. 

 Silver, effect of the spectrum on the 



haloid salts of (Abney) , 164. 

 Skin, excretion of nitrogen by the 



(Power), 354. 

 propagation of heat by conduction 



in (Lombard), 11. 

 Skull in Lepidosteus osseus, development 



of (Parker), 107. 

 Solar energy, on the conservation of 



(Siemens), 389. 

 Sound, action of free molecules on 



radiant heat, and its conversion 



thereby into (Tyndall), 33. 

 Spectral lines, disappearance of some, 



and the variations of metallic spectra 



due to mixed vapours (Liveing and 



Dewar), 428. 

 Spectrum of carbon (Liveing and Dewar) , 



403. 



of comet b 1881, preliminary notes 



on photographic (Huggins), 1. 

 of cyanogen, reversal of the (Liveing 



and Dewar), 3. 

 of water. No. II (Liveing and 



Dewar) , 274. 

 on haloid salts of silver, effect of the 



(Abney), 164. 

 photographic, of the great nebula 



in Orion (Huggins), 425. 

 Spottiswoode (W.), note on Mr. Russell's 



paper " On certain definite integrals. 



No. 10," 341. 

 1 " On certain geometrical 



theorems. No. 1," 211. 

 and F. Moulton, on the move- 

 ment of gas in "vacuum discharges," 



453. 



Stanley (Dean), obituary notice of, xx. . 



Stewart (B.), preliminary report to the 

 Solar Physics Committee on a com- 

 parison for two years between the 

 diurnal ranges of magnetic declination 

 as recorded at Kew Observatory, and 

 the diurnal ranges of atmospheric 



