INDEX I. 



233 



and priutiug catalogues of spectral rays 

 arranged upon a scale of wave-num- 

 bers, 249. 



Roberts (W. C.) on the chemical con- 

 stitution and optical properties of es- 

 sential oils, 214 ; on the metli9d of 

 making gold-assays, and of stating the 

 results thereof, 219. 



Rolleston (Dr.) on the foundation of 

 zoological stations, 408. 



Roscoe (Prof.) on the monthly reports 

 of the progress of chemistry, 451 ; on 

 science-lectures and organization, 495. 



Russell (W. H. L.) on recent progress 

 in elliptic and hyperelliptic functions, 

 807. 



Sadler (J.) on the influence of forests on 

 the rainfall, 488. 



Salmon (Dr.) on instruction in ele- 

 mentary geometry, 459. 



Sanford (W. A.) on the exploration of 

 Kent's Cavern, 198. 



Schafarik (Prof. A.) on the visibility of 

 the dark side of Venus, 404. 



Science-lectures and organization, re- 

 port of the committee on, 495. 



Sclater (Dr.) on the foundation of 

 zoological stations, 408. 



Scotland, fourth reporton earthquakes in, 

 194. 



Sea, report on machinery for obtaining 

 a record of the roughness of the, and 

 measiu'ement of waves near shore, 

 495. 



Settle Caves, report of the committee 

 appointed for the purpose of exploring 

 the, 250. 



Sewage, fifth report on the treatment 

 and utilization of, 413 ; the dry- 

 earth system, 413 ; Earlswood sewage- 

 farm, 414 ; IBreton's farm, Romford, 

 415 ; abstract of previous reports, 

 438 ; conclusions arrived at by the 

 committee, 449. 



Ships, instruments for measuring the 

 speed of, report of the committee ap- 

 pointed to make experiments on, 460. 



Siemens (Dr.) on dynamical and elec- 

 trical units, 222. 



Smith (Prof. H. J. S.) on mathematical 

 tables, 1 ; on instruction in elementary 

 geometry, 459. 



Spectral rays, report of the committee 

 appointed to construct and print cata- 

 logues of, arranged upon a scale of 

 wave-numbers, 249, 



Speed of ships, report of the committee 

 appointed to make experiments on 

 instruments for measuring the, 4G0. 



1873. 



Spottiswoode ( W.) on instruction in ele- > 

 mentary geometry, 459. 



Stainton (II. T.) on science-lectures and 

 organization, 495. 



Stewart (Prof. Balfour) on science-lec- 

 tures and organization, 495. 



Stokes (Prof.) on mathematical tables, 1. 



Stoney (G. J.) on djiiamical and elec- 

 trical units, 222, 225 ; on constructing 

 and printing catalogues of spectral 

 rays, arranged upon a scale of wave- 

 numbers, 249. 



Sub- Wealden exploration, report on the, 

 490. 



, geological report, by W. 



Topley, on the, 491. 



Sun-spot periodicity, C. Meldrum on a 

 periodicity of cyclones and rainfall in 

 connexion with the, 466. 



Swan (Prof) on constructing and priut- 

 iug catalogues of spectral rays arranged 

 upon a scale of wave-iuimbers, 249. 



Sylvester (Prof) on the rainfall of the 

 British Isles for the years 1872-73, 

 257 ; on instruction in elementary 

 geometry, 459, 



Symons (G-. J.) on underground tempe- 

 rature, 252; on the rainfall of the 

 British Isles for the years 1872-73, 

 257, 



Tait (Prof.) on the determination of 

 high temperatures by refracted rays, 

 461 ; on science-lectures and organiza- 

 tion, 495. 



Temperature, undergroimd, sixth report 

 on the rate of increase of, downwards 

 in various localities of dry land and 

 under water, 252. 



Temperaturesjhigh, on the determination 

 of, by refracted rays, 46] . 



Thomson (Dr. A.) on science-lectures 

 and organization, 495. 



(J.) on the Labyrinthodonts of 



the coal-measures, 225 ; on the struc- 

 ture of carboniferous-limestone corals, 

 479. 



(Prof. Sir W.) on mathematical 



tables, 1 ; on earthquakes in Scotland, 

 194 ; on dynamical and electrical 

 units, 222 ; on imderground tempera- 

 ture, 252 ; on the determination of 

 high temperatvu'es by refracted rays, 

 461 ; on science-lectures and organiza- 

 tion, 495. 



(Prof. Wyville) on the foimdation 



of zoological stations, 408; on science- 

 lectures and organization, 495. 

 Tinn^ (J. A.) on science-lectures and 

 organization, 405, 



16 



