468 
INDEX. 
solutions of, in various solvents, 
459. 
Salt-solutions, on the molecular vo- 
lumes of, 121. 
Selective absorption, on, 317. 
Siemens (Sir W.) on the conservation 
of solar energy, 62. 
Siemens (Werner) on the assumption 
of a solar electric potential, 161. 
Solar electric potential, on the as- 
sumption of a, 161. 
■ energy, on the conservation of, 
62. 
Solenoid, on the induction produced 
by variation of the intensity of the 
electric current in a spherical, 456. 
Sollas (Prof. W. J.) on the estuaries 
of the Severn, 156. 
Sound, on porous bodies in relation 
to, 181 ; on tbe velocity of, in air 
447. 
Spectroscopic notes, 460. 
Squares, on the method of least, 360. 
Steel, on effects of retentiveness in 
the magnetization of, 159, 381. 
Stevens (E. K.) on the electromotive 
force of alloys, 435. 
Sun-spots and terrestrial elements in 
tbe sun, on, 401. 
, on the spectra of, 460. 
Sylvester (Prof. J. J.) on the totients, 
suin-totients, &c, of all the num- 
bers from 501 to 1000, 230 ; on the 
equation to the secular inequalities 
in the planetary system, 267 ; on 
the involution and evolution of 
quaternions, 394. 
Tait (Prof. P. G.) on the laws of 
motion, 439. 
Temperature, energy, and radiation, 
on the relations between, 224. 
Thermal conductivity, on the influ- 
ence of magnetism upon, 397. 
Thermoelectric properties of quartz, 
on the, 194. 
Thompson (C.) on the determination 
of chemical affinity in terms of 
electromotive force, 25. 
Totients and sum-totients, table of, 
230. 
Tribe (A.) on the influence of cur- 
rent, temperature, and strength of 
electrolyte on the area of electrifi- 
cation, 90 ; on the influence of the 
direction of the lines of force on 
the distribution of electricity on 
metallic bodies, 269 ; on the dis- 
tribution of electricity on hollow 
conductors in electrolytes, 384. 
Trowbridge (Prof. J.) on the influ- 
ence of magnetism upon thermal 
conductivity, 397 ; on the electro- 
motive force of alloys, 435. 
Tschermak (Prof.) on the classifica- 
tion of meteorites, 464. 
Vapour, on the electrical neutrality 
of, from electrified still surfaces of 
liquids, 211. 
Vesuvius, on the geology of, 239. 
Viscous fluid, on a general theorem 
of the stability of the motion of a, 
112. 
Vulcanology, studies in, 239. 
Waldo (F.) on Ferrel's theory of 
atmospheric currents, 264. 
Water, on a photo-chemical method 
for the determination of organic 
matter in potable, 9. 
Wiedemann (C.) on a new method 
of insulating metal wires, 400. 
Wiedemann (Prof. E.) on the rela- 
tion between the internal friction 
and resistance of solutions of salts 
in various solvents, 459. 
Woodward (C. J.) on a group of 
minerals from Lilleshall, 68 ; on 
an apparatus to illustrate the pro- 
duction of work by diffusion, 375. 
Worthington (A. M.) on Laplace's 
theory of capillarity, 339. 
Wright (L.) on mica films and prisms 
for polarizing purposes, 109. 
Wright (Dr. R. C. A.) on the deter- 
mination of chemical affinity in 
terms of electromotive force, 25. 
Wroblewski (Prof. S.) on the lique- 
faction of oxygen and the conge- 
lation of carbon disulphide and 
alcohol, 75 ; on the liquefaction of 
nitrogen and carbonic oxide, 76. 
Young (Prof. C. A.), spectroscopic 
notes by, 460. 
END OF THE SIXTEENTH VOLUME. 
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