9S4 



INDEX. 



Spark phenomena, on short, 340. 



potentials, on minimum, 456. 



Spectrum of the radium emanation, 

 on ill.. 313: extension of the 

 principal series of the sodium. 



y4o. 



Spicei (Rev. E. C.) on solution- 

 valleys in the G-lyme area. 7".*'). 



Steel, on the results of tests of, 

 under comhined stresses, 720. 



Stephenson (A.) on periodic non- 

 generating force of high frequency, 

 616. 



Stoney (Dr. G-. J.) on telescopic 

 vision, 318, 796, 950. 



suits oi tests of materials 

 under combined, 720. 



Strings, on the partial ton 

 stretched, oi' variable density, 

 235. 



Sutherland (W.) on another method 

 of measuring large molecular 

 masses, 497. 



Telegraphy, on b directive Bystem 

 of wireless, •'••'i v . 



Telephones, notes on, -4-1. 



Telephonic m lasurements, on the 

 production of alternating currents 

 for, 480. 



Telescopic vision, on, 318, 796, 950. 



Thermoelectric forces, on the cor- 

 puscular theory of th >, 76*7. 



Thomson i Prof. J. J. I on positive 

 rays, 657. 



Thorium, on the condensation of the 

 emanation from, 1-1 ; on the rela- 

 tive activity of the emanation and 

 the active deposit from, 291. 



Tool (A. Q.) on the optical proper- 

 ties of films i f magnetic metals. 

 833. 



Tosi (A.) on a directive system of 

 wire! l ,n . v ; 638. 



Transformers, on the use of, with 

 measuring instruments, 142. 



Trowbridge (Prof. J.) on positive 

 rays. 697. 



Tyndall (A.M.) on the- changes of 

 pressure which accompany point 

 discharge through hydrogen, 24. 



Unit-stere theory, on the, UO. 



Uranium, on the relation between 

 radium and, 632. 



Vacuum-tube model for demons- 

 trating- the propagation of electric 

 currents in cables, on a, 718. 



Vapour-pressure of mercury, on the, 

 789. 



Vaughan (Lv. A.) on the carboni- 

 ferous rocks at Loughahinny, 494. 



Vegard (1,.) on osmosis and osmotic 

 pressure. 247, 396. 



Very (F. W.) on the greenhouse 

 theory and planetary temperatures, 

 462. ' 



Vibrations, on the maintenance of, 

 by impart of water drops, 238. 



Visibility curves, on an improve- 

 ment in the method of deter- 

 mining, 395. 



Water, on the action of the radium 

 emanation upon; 812. 



Water vapour, on the decomposition 

 of, by electric sparks, 92s 



Watson (II. 15.) on some properties 

 of artists' colours. 725. 



Wilde I Dr. I l.i mi the atomic Weight 

 of radium, 824. 



Wilson (Prof.E. 1>.) on tin.' principle 

 of relativity, 411). 



Wireless telegraphy, on a directive 



s\.-te]|l of, 638. 



Wood ( Prof. R. W.) on the emission 

 of polarized light by iluorescent 

 gases, J' K 4 : on a method of show- 

 ing fluorescent absorption, 5)40; 

 extension of the principal series 

 of the sodium spectrum, 945. 



Wright (C. S.) on an improvement 

 in the method of determining 

 visibility curve,-, 395. 



Xenotime, on the dispersion of mag- 

 netic rotatory power in the neigh- 

 bourhood of absorption-bands in, 

 153. 



Young- (Dr. A. P.) on the strati- 

 graphy of the Tarnthal mass, 704. 



Young (Prof. S.) on ortho baric 

 volumes in relation to pressure 

 and temperature, 222. 



EX1) OF THE SIXTEENTH VOLUME. 



Printed by Taylok and Fkancis, Eed Lion Court. Fleet Street. 





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