[ 769 ] 
INDEX to VOL. XV. 
^\ctiniuin, on the distribution in 
electric fields of the active deposits 
of, 601 ; on the electrical charge of 
the active deposit of, 737. 
Adams (Dr. F. D.) on the Laurentian 
system of Canada, 201. 
Adsorption, on, 499. 
Alpha-rays, on changes of velocity 
of the, in an electric field, 720. 
Atmosphere, on the thermally ex- 
cited vibrations of an, 147. 
Atom, on the existence of positive 
electrons in the sodium, 274. 
Atomic origins, on the formation of 
concrete matter from, 397. 
weight of radium, 280. 
Bakker (Dr. G.) on the theory of 
surface -forces, 413. 
Barkla (Dr. C. G.) on X-rays, 288. 
Bars, on the lateral vibration of, 497. 
Barton (Prof. E. H.) on spherical 
radiation and vibrations in conical 
pipes, 69. 
Basedow (H.) on beds of Cambrian 
age in S. Australia, 203. 
Bessel integrals, on certain, 332. 
Beta rays, on changes of velocity of 
the, in an electric field, 720. 
Books, new : — Cheneveau's Recher- 
ches sur les Proprietes optiques des 
Solutions et des Corps Dissous, 
200 ; Rivista di Scienza, 200 ; 
Seidell's Solubilities of Inorganic 
and Organic Substances, 201 ; 
Lehrbuch der Gerichtlichen 
Chemie, 393 ; Clark's The Polarity 
of Matter, 394; Fischer's Guide 
de Preparations Organiques a 
1' Usage des Etudiants, 394 ; von 
Rohr's Die Binokularen Instru- 
mente, 394 : Annuaire du Bureau 
des Longitudes, 395 ; The Science 
Year-Book and Diary, 395 ; Bril- 
louin's Lecons sur la Yiscosite des 
Liquides et des Gaz, 395 ; Bulletin 
of the Bureau of Standards, 396 ; 
Barus's Condensation of Vapor as 
induced by Nuclei and Ions, 559 ; 
Carslaw's Fourier's Series and 
Integrals, 569 ; van Laar's Sachs 
Vortrage fiber das Thermodyna- 
mische Potential, 570 ; The Scien- 
tific Papers of J. Willard Gibbs, 
570 ; Newcomb's Compendium of 
Spherical Astronomy, 570 ; Pern- 
ter's Meteorologische Optik, 571 ; 
Fournier d'Albe's Two New 
AVorlds, 572 ; Whitehead's The 
Axioms of Projective Geometry 
and the Axioms of Descriptive 
Geometry, 676 ; W. H. & G. C. 
Young's Theory of Sets of Points, 
676 ; Bulletin of the Bureau of 
Standards, 768. 
Bonney (Prof. T. G.) on antigorite 
and the Yal Antigorio, 578. 
Bowlker (T. J.) on the direction 
of sound, 318. 
Bragg (Prof. W. H.) on the nature 
of the y rays, 663. 
Bryan (Prof. G. H.) on certain 
dynamical analogues of tempera- 
ture equilibrium, 765. 
Brydone (R. M.) on the chalk at 
Trimmingham, 577. 
Bucherer (Prof. A. H.) on the 
principle of relativity and on the 
electromagnetic mass of the 
electron, 316. 
Buckingham (E.) on the thermo- 
dynamic corrections of the nitrogen 
scale, 526. 
Bumstead (Prof. H. A.) on heating 
effects produced by Rontgen rays 
in lead and zinc, 432. 
Burbury (S. H.) on the mixing of 
gases, 768. 
Burton (Dr. C. V.) on the thermally 
excited vibrations of an atmo- 
sphere, 147. 
