INDEX. 



729 



flowers, the amounts of, A. S. Wilson 

 on, 504. 



*Sun-heat received at the several lati- 

 tudes of the earth, taking account of 

 the absorption of heat by the atmos- 

 phere, with conclusions as to the abso- 

 lute radiation of earth-heat into space, 

 and the minimum duration of geo- 

 logical time, Prof. Haughton on the, 

 482. 



Sunspots and rainfall, report on, by C. 

 Meldrum, 230. 



Surface tension, G. F. Fitzgerald on, 

 436. 



Survey of Galilee, Lieut. H. H. Kitchener 

 on the, 622. 



Symons (G. J.) on underground tem- 

 perature 178 ; on the rainfall of Ire- 

 land, 692. 



Tait (Dr. L.) on the occurrence of a 

 sacral dimple and its possible signifi- 

 cance, 606. 



Tait (Prof.) on the mechanical equiva- 

 lent of heat, ] 02 ; on the elasticity of 

 wires, 103. 



Tangential equation, a new form of, Prof. 

 Case}' on 457. 



Taxation, direct, a common measure of 

 value in, report on, 220. 



Tea plant, the geographical distribution 

 of the, A. Burrell on, 638. 



*Telegraphic apparatus, recent improve- 

 ments in, W. H. Preece on, 697. 



Temperature of the earth within, W. 

 Morris on the, 456. 



— — , underground, eleventh report on 

 the rate of increase of, downwards in 

 various localities of dry land and 

 under water, 178. 



Tenby, report on the examination of two 

 caves containing human remains in 

 the neighbourhood of, 209. 



Thermal conductivities of certain rocks, 

 fifth report on experiments to deter- 

 mine the, showing especially the geo- 

 logical aspects of the investigation, 

 133. 



Thetines, Prof. E. A. Letts on the, 511. 



Thompson (Prof. 8. P.) on certain pheno- 

 mena accompanying rainbows, 450 ; on 

 new magnetic figures, 450 ; on the 

 phenomena of binaural audition, 601. 



and Dr. O. J. Lodge on unilateral 



conductivity in tourmaline crystals, 

 495. 



Thomson (Dr. A.) on some points in 

 the osteology of an infantile gorilla 

 skeleton, 597 ; on the aberrant form 

 of the sacrum connected with Nae- 

 gele's obliquely contracted pelvis, 

 605. 



Thomson (Prof. Sir C. Wyville) *on the 



genus Holopm, 571 ; on some deep sea 

 radiolarians, 571 ; Address by, to the 

 Geographical Section, 613 ; *on the 

 progress of the official report of the 

 " Challenger " expedition, 633. 



Thomson (Prof. J.) on instruments for 

 measuring the speed of ships, 219; on 

 the flow of water in uniform regime 

 in rivers and in open channels gene- 

 rally, 434 ; on dimensional equations, 

 and on some verbal expressions in 

 numerical science, 451. 



Thomson (Prof. Sir Wm.) onthemechani- 

 cal equivalent of heat, 102 ; on arrange- 

 ments for taking certain observations 

 in India, and observations on atmo- 

 spheric electricity at Madeira, 103 ; on 

 the elasticity of wires, 103 ; on patent 

 legislation, 157 ; on mathematical 

 tables, 1 72 ; on underground tempera- 

 ture, 178 ; 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, 217 ; on the datum-level of the 

 Ordnance Survey of Great Britain, and 

 the tabulation and comparison of other 

 datum-marks, 219 ; on instruments for 

 measuring the speed of ships, 219; on 

 the effect of propellers on the steering 

 of vessels, 419; on Gaussin's warning 

 regarding the sluggishness of ships' 

 magnetism, 496 ; on the influence of 

 the Straits of Dover on the tides of 

 the British Channel and the North 

 Sea, 639. 



Thomson (Prof. Sir Wm.) and Capt. 

 Evans on the tides of the southern 

 hemisphere and of the Mediterranean, 

 477. 



Thomson (Wl) on the estimation of 

 mineral oil or paraffin wax when mixed 

 with other oils or fats, 508. 



Tichborne (Dr. C. R. C.) on some pecu- 

 liarities of the Vartry water, and on 

 the action of that water upon boiler 

 plates, 517. 



Tidal observations at Madeira or other 

 islands in the North Atlantic Ocean, 

 on the value of, 217. 



Tiddeman (R. H.) on the erratic blocks 

 of England, Wales, and Ireland, 185 ; 

 on the exploration of the Settle Caves 

 (Victoria Cave), 377. 



Tides of the British Channel and the 

 North Sea, the influence of the Straits 

 of Dover on the, Sir William Thomson 

 on, 639. 



of the southern hemisphere a~d of 



the Mediterranean, Capt. Evans and Sir 

 Wm. Thomson on the, 477. 



stationary, in the English Channel 



and the North Sea, report on the phe- 

 nomena of, 217. 



