INDEX. 



799 



Temple (Sir E.) on the progress of geo- 

 graphy in Asia during the last tifty 

 years, 741. 



Terrestrial magnetic disturbance, the 

 general coincidence between sunspot 

 activity and, Rev. F. Hewlett on, 541. 



Terrill (W.) on the erratic blocks of 

 England, Wales, and Ireland, 204 



Tertiary flora of the North of Ireland, 

 third report on the, 152. 



Theory of screws, the extension of the, 

 to the dynamics of any material 

 system, R. S. Ball on, 547. 



Thermal conductivities of certain rocks, 

 final report on experiments to deter- 

 mine the, showing especially the geo- 

 logical aspects of the investigation, 

 126. 



Thermograph, Bowkett's, W. Lant Car- 

 penter on, 604. 



Thiselton-Dyer (Mr.) on the natural 

 history of Timor- laut, 197. 



Thompson (Prof. S. P.) on the manner in 

 which rudimentary science should be 

 taught, and how examinations should 

 be held therein, in elementary schools, 

 148 ; on the electric conductivity and 

 dichroic absorption of tourmaline, 531 ; 

 on volta-electric inversion, 552 ; on a 

 new polarising prism, 563 ; on binaural 

 audition : Part III., 565 ; on the double 

 iodide of mercury and copper, 600 ; on 

 the function of the two ears in the 

 perception of space, 716. 



Thomson (Sir C. Wj'ville) on the Scottish 

 zoological station, 177 ; on the occu- 

 pation of a table at the zoological 

 station at Naples, 178. 



Thomson (Prof. Sir Wm.) on meteoric 

 dust, 88 ; on underground temperature, 

 90 ; on the measurement of the lunar 

 disturbance of gravity, 93 ; on the phe- 

 nomena of the stationary tides in the 

 English Channel and the North Sea, 

 and the value of tidal observations in 

 the North Atlantic Ocean, 160; on 

 patent legislation, 222 ; on mathe- 

 matical tables, 303 ; on standards for 

 use in electrical measurements, 423 ; 

 Address by, to the Mathematical and 

 Physical Section, 513 ; on some uses 

 of Faure's accumulator in connection 

 with lighting by electricity, 626 ; on 

 the economy of metal in conductors of 

 electricity,zJ.; on the proper proportions 

 of resistance in the working coils, the 

 electro-magnets, and the external cir- 

 cuits of dynamos, 528 ; *on an electro- 

 ergometer, 554 ; *on photometry, with 

 experiments, 561. 

 and J. T. Bottomley on the illumi- 

 nating powers of incandescent vacuum 

 lamps with measured potentials and 

 measured currents, 559. 



Thomson (W.) on some phenomena 

 which appear to be of the nature of 

 chemico-magnetic action, 590. 



Thorpe (Prof. T. E.) on the chemical 

 action between solids, 580 ; on the 

 action of zin9 and magnesium on acidi- 

 fied solutions of ferric sulphate, 595 ; 

 *on vapour density determinations, 

 597. 



and Prof. A. W. Riicker on the 



calibration of mercurial thermometers 

 by Bessel's method, 540. 



Tidal observations at Madeira or other 

 islands in the North Atlantic Ocean, 

 the value of, 160. 



Tiddeman (R. H.) on the erratic blocks 

 of England, Wales, and Ireland, 204. 



Tides, the stationary, in the Englisli 

 Channel and the North Sea, the phe- 

 nomena of, fourth report on, 160. 



Timor-laut, report on the natural history 

 of, 1 97. 



Topley (W.) on an international scale of 

 colours for geological maps, 647. 



*Torrens (Sir R.), results to be attained 

 by applying to the transfer of land in 

 this country the methods employed in 

 the British Colonies, 760. 



Tourmaline, the electric conductivity and 

 dichroic absorption of, Prof. S, P. 

 Thompson on, 531. 



♦Transfer of land, the results to be 

 attained by applying to the, in this 

 country the methods employed in the 

 British Colonies, by Sir R. Torrens, 760. 



* Transmission of power by electricity, 

 J. N. Shoolbred on the, 779. 



Tribe (A.), note on a new method of 

 measuring certain chemical affinities, 

 592. 



Tyndall (Prof. J.) on the arrestation of 

 infusorial life by solar light, 450. 



Underground temperature, fourteenth 

 report on the rate of increase of, 

 downwards in various localities of 

 dry land and under water, 90. 



Underground waters in the Jurassic, New 

 Red Sandstone, and Permian formations 

 of England, the circulation of the, and 

 the quality and quantity of the water 

 supplied to towns and districts from 

 these formations, seventh report on, 

 309. 



Upper Bagshot Sands of Hordwell Cliff, 

 Hampshire, E. B. Tawney on the, 633. 



Ussher (R. J.), report to the Committee 

 for exploring 1 he caves of the South of 

 Ireland, 218. 



Ussher (W. A. E.) on the Palasozoic rocks 

 of North Devon and West Somerset, 

 629. 



Vanadium solutions, the reducing action 



