716 



INDEX. 



-Scott (Maj.-Gen.) on the effects of mag- 

 nesia on vegetation, 550. 



Sedgwick (A.) on the origin of the head- 

 kidney, 644. 



Seeley (Prof. H. G.) on the mode of 

 reproduction of certain species of 

 Ichthyosaurus from the lias of England 

 and Wiirtemberg, 68. 



■Septum permeable to water and imper- 

 meable to air, Prof. Sir W. Thomson 

 on a, with practical applications to a 

 navigational depth-gauge, 488. 



•Sewage, a new mode for tlie pm-ification 

 of, P. Spence on, 534. 



Shaen (Mr.) on the appointment of H. M. 



inspectors of elementary schools, 219. 

 '■*Shakespear (Col.) on tlie Shakespear 

 safety lamp, 699. 



Shida (R.) on the number of electro- 

 static units in the electro-magnetic 

 unit, 497. 



*Ships, the loading of, W. E. Hall on, 

 699. 



, the steering of, Prof. O. Reynolds 



on, 699. 



■Shoolbred (J. N.) on the phenomena of 

 the stationary tides in the English 

 Channel and the North Sea, and the 

 value of tidal observations in the North 

 Atlantic Ocean, 390. 



Liberia, through, rid the Amiir and the 

 Ussuri, by the Rev. H. Lansdell, 656. 



Siemens (Dr. C. W.) on the measurement 



of the lunar disturbance of gravity, 



25; on secular experiments on the 



• elasticity of wires, 61 ; on patent 



legislation, 318. 



Silver, a new process for separating, 

 from copper contained in copper ores 

 and reguluses, W. Henderson on, 546. 



Silver sulphate, note on, by P. Braham, 

 550. 



Siwalik and Pikermi vertebrate and 

 invertebrate faunas, the geological age 

 and relations of the, W. T. Blanford 

 on, 577. 



''Skew surface of the third order, note on 

 the, by Prof. H. J. S. Smith, 482. 



" Skyi-ing Water, Straits of Magellan, a 

 visit to, R. W. Coppinger on, 665. 



Sladen (P.) on the occupation of a table 

 at the zoological station at Naples, 161. 



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

 tables, 30 ; *on inverse figures in 

 geometry, 476 ; *on a mathematical 

 solution of a logical problem, 476 ; *ou 

 the distribution of circles on a sphere, 

 476 ; *note on the skew surface of 

 the third order, 482 ; *on a kind of 

 periodicity presented by some elliptic 

 functions, 482. 



■Snipe, the ' drumming ' of the, Capt. W. 

 V. Legge on, 604. 



Socotra, the natural history of, report on 



the steps taken for investigating, 212 ; 

 report to the Committee by Prof. Bayley 

 Balfour, 212. 



Sollas (Prof. W. J.) on the island of Tor- 

 ghatten, 576 : on a fragment of mica 

 schist, 577 ; <in a striated stone from 

 the trias of Portishead, 586 ; on the 

 action of a lichen on limestone, 586 ; 

 on sponge-spicules from the chalk of 

 Trimmingham, Norfolk, 586. 



Sorby (H. C.) Address by, to the Geo- 

 logical Section, 565. 



* Sounding machine, an improved, Sir W. 

 Thomson on, 703. 



Specific rotatory power of cane and in- 

 vert sugar, A. H. Allen on the, 541. 



Spectrum analysis, report on the present 

 state of our knowledge of, 258. 



Spence (P.) on a new mode for the puri- 

 fication of sewage, 534. 



Spiller (J.) on the identification of the 

 coal-tar colours, 542. 



Sponge-spicules from the chalk of Trim- 

 mingham, Norfolk, Prof. W. J. Sollas on, 

 586. 



*.Spontaneous combustion of coals in 

 .ships, .T. Bamfield on the, 696. 



Spreugel vacuum, a good, the specific in- 

 ductive capacity of, and the specific 

 resistance of gases at different pres- 

 sm-es, preliminary report of the Com- 

 mittee for accurately measuring, 197. 



Spurrell (E. C. J.) on the site of a 

 paliBolithic implement manufactory at 

 Crayford, Kent, 574. 



*Starling (J. W.), exhibition of an im- 

 proved volumetric apparatus, 534. 



Stationary tides in tlie English Channel 

 and the North Sea, the phenomena of 

 the, third report on, 390. 



*Statistics,Economic Science and. Address 

 by G. W. Hastings to the Section of, 

 671. 



*Steam boilers, the incrustation of, "W. 

 Thomson on, 703. 



Steam-liquid temperature of a fluid, a 

 method of determ.ining the, without 

 mechanism. Sir W. Thomson on, 496. 



Steering of sliips. Prof. O. Reynolds on 

 the, 699. 



Stokes (Prof. G. G.) on mathematical 

 tables, 30. 



Stone age in South Africa, W, D. Goocli 

 on the, 622. 



- implements, the occuiTence of, in 

 the coast laterite, south of Madras, 

 and in high-level gravels and other 

 formations in the South Maliratta 

 country, R. B. Foote on, 589. 



Stoney (Mr.) on the present state of our 

 knowledge of spectrum analysis, 258. 



Stopes (H.) on a palaaolithic stone im- 

 plement from Egypt, 624 ; on a palaeo- 

 lithic flint implement from Palestine, 



