764 



INDEX to VOL. XIII. 



Acoustical notes, 214, 316, 452. 



Adams (J. M.) on a spectrum of the 

 Rontgen rays from a focus tube, 

 576. 



JEther, on the density of the, 488, 

 727 ; on, and electrons, 693. 



Air, on the diurnal periodicity of the 

 spontaneous ionization of, 265. 



Alpha particles, on the Telocity and 

 energy of the, 110; on the ioni- 

 zation of Tarious gases by the, 333 ; 

 on the influence of the velocity of 

 the, on the stopping power of the 

 substances through which they 

 pass, 507. 



Aluminium, on the fatigue of, sub- 

 jected to Rontgen radiation, 



I 708. 



Arber (E. A. N.) on the upper car- 

 boniferous rocks of Devon and 

 Cornwall, 287. 



Atmosphere, on the ionization of the, 

 over the ocean, 248 : on the radio- 

 active matter in the, 378. 



Attraction of ellipsoidal shells and 

 solid ellipsoids, on the, 385. 



Auroral and sunspot frequencies, on, 

 149. 



Baker (W. C.) on a device for the 

 recovery of spilled mercury, 656. 



Baldwin (J. M.) on the behaviour of 

 iron under small periodic mag- 

 netizing forces, 232. 



Barton (Prof. E. H.) on simulta- 

 neous vibration-curves of string 

 and bridge obtained from a mono- 

 chord, 446. 



Barus (Dr. C.) on the efficiency of 

 the plug-cock fog-chamber, 357. 



Behn (U.) on the flame-tube, 627. 



Bismuth, on the influence of tension 

 on the resistance of, 641. 



Blanc (Dr. G. A.) on the radioactive 

 matter in the earth and atmo- 

 sphere, 378. 



Bonney (Prof. T. G.) on the Savoy 

 and Swiss Alps, 762. 



Books, new : — Huggins's The Royal 

 Society, 186 ; Lcrentz's Abhandl- 

 ungen iiber theoretische Physik, 



187 ; Bornstein's Leitfaden der 

 Wetterkunde, 187; Allen's Some 

 Founders of the Chemical In- 

 dustry, 188; Marx's Die Gesch- 

 windigkeit der Rontgenstrahlen, 



188 ; d'Albe's The Electron 

 Theory, 286 ; Woods's ^Ether, 

 287; Petrovitch's La Mecanique 

 des Phenomenes fondee sur les 

 Analogies, 383; Bromwich's Quad- 

 ratic Forms, 384 ; Annuaire du 

 Bureau des Longitudes, 384 ; 

 Cotton et Mouton's Les Ultra- 

 microscopes et les Objets Ultra- 

 microscopiques, 559 ; Pierpont's 

 Lectures on the Theory of Func- 

 tions of Real Variables, i., 560 ; 

 Denning's Five-Figure Mathe- 

 matical Tables, 643 ; The Science 

 Year Book, 644; The Physical 

 Laboratories of the University of 

 Manchester, 644; Perry's Teaching 

 of Elementary Mechanics, 645 ; 

 Koenigsberger's Hermann von 

 Helmholtz, 645 ; Muir's History 

 of Chemical Theories and Laws, 

 646 ; Bouasse's Cours de Physique, 

 647 ; Lodge's Electrons, 759 ; 

 Larmor's Memoir and Scientific 

 Correspondence of Sir George 

 Gabriel Stokes, 760; Watts's Index 

 of Spectra, App. R, 760. 



Bottomley (Dr. J. T.) on experi- 

 ments with vacuum gold-leaf 

 electroscopes on the mechanical 

 temperature effects in rarefied 

 gases, 747. 



Bragg (Prof. W. H.) on the ioniza- 

 tion of various gases by the a, 

 particles of radium, 333 ; on the 



