INDEX. 
71 
Joly (Prof. J.) on the radioactivity 
of sea-water, 385. 
Kelvin (Lord) on the formation of 
concrete matter from atomic 
origins, 397 ; on the problem of a 
spherical gaseous nebula, 687. 
Kirkby (Rev. P. J.) on the positive 
column in oxygen, 559. 
Kleeman (R. D.) on different kinds 
of y rays of radium, 638.^ 
Lead, on the heating effects pro- 
duced bv Rontgen rays in, 432. 
Lehfeldt (Prof. R. A.) on the electro- 
chemical equivalents of oxygen 
and hydrogen, 614. 
Lens, on the focometry of a concave, 
198, 300. 
Lewis (VV. C. M.) on Gibbs's theory 
of surface-concentration, 499. 
Lowell (Prof. P.) on the tores of 
Saturn, 468. 
Madsen (Dr. J. P. V.) on the nature 
of the y rays, 663. 
Magnetic induction in an elongated 
spheroid, on, 65. 
properties, on the explanation 
of, 172. 
rotatory dispersion, on the anom- 
alous, of neodymiuni, 270 ; of rare 
earths, 538. 
Mallik (Prof. D. V.) on a potential 
problem, 63 ; on the experimental 
determination of magnetic induc- 
tion in an elongated spheroid, 65 ; 
on mutual induction, 364. 
Mass, relation of, to energy, 1. 
Materials, on the rupture of, under 
combined stress, 81. 
Matter, on the electron theory of, 
172 ; on the formation of concrete, 
from atomic origins, 397. 
Meadowcroft (L. V.) on the curva- 
ture and torsion of a helix on any 
cylinder, 55. 
Mendenhall (C. E.) on phenomena 
exhibited by small particles on a 
Nernst glower, 205. 
Miller (G. A.) on the groups of 
isomorphisms of the groups whose 
degree is less than eight, 223. 
Morley (Prof. A.) on laterally loaded 
struts and tie-rods, 711. 
Morrow (Dr. J.) on the lateral vibra- 
tion of bars, 497. 
Moss (H.) on the contact potential- 
differences determined by means 
of null solutions, 478. 
Nebula, on the problem of a spherical 
gaseous, 687. 
Neodynrium, on the anomalous mag- 
netic rotatory dispersion of, 270. 
Nernst glower, on phenomena ex- 
hibited by particles on a, 205. 
Newton's rings, on the effect of a 
prism on, 345. 
Nitrogen scale, on the thermo- 
dynamic corrections of the, 526. 
Optical systems of revolutions, on 
von Seidel's theorems relating- to, 
677. 
Orr (Prof. W. McF.) on the mixing 
of gases, 297. 
Orstrand (C. E. van) on inverse 
interpolation by means of a re- 
versed series, 628. 
Owen (G.) on molecular aggregations 
produced bv sudden cooling, 
746. 
Oxygen, on the positive column in, 
559 ; on the electrochemical equi- 
valent of, 614. 
Phosphorescence, mechanical, 352. 
Pipes, on spherical radiation and 
vibrations in conical, 69. 
Porter (Prof. A. W.) on the effect 
of the position of the grating on 
the resolving power of a spectro- 
scope, 762. 
Positive column in oxygen, on the, 
559. 
Potential differences, on the contact, 
determined by means of null solu- 
tions, 478. 
problem, on a, 63. 
Prism, on the effect of a, on Newton's 
rings, 345. 
Radioactive substances, on the 
irregularities in the radiation 
from, 539; on changes of velocity 
of rays from, 720. 
Radioactivity of sea-water, 385. 
Radium, on the atomic weight of, 
280 ; on the distribution in electric 
fields of the active deposits of, 601 ; 
on the y rays of, 638. 
Ramage (H.) on the evolution and 
devolution of the elements, 396. 
Rayleigh (Lord) on the effect of a 
prism on Newton's rings, 345 ; 
measurements of wave-lengths and 
notes on Fabry and Perot's appa- 
ratus, 548; on Hamilton's prin- 
ciple and the five aberrations of 
von Seidel, 677. 
