[ 1038 ] 



INDEX to VOL. XXVII. 



ACIDS, on the brush discharge in 



weak, 801. 

 Actinium, on the diffusion of, 591 ; 



on the transformations in the 



active deposit of, 690. 



emanation, on the period of 



transformation of, 720. 



Adams (Prof. E. P.) on electro- 

 magnetic effects related to the 

 Hall effect, 244. . 



./Ether, on an experiment indicating 

 that matter takes up no room in 

 the, 843. 



Air-pressures, on the, used in playing 

 reed instruments, 271. 



Allen (A. 0.) on the slip-curves of 

 an Amsler planimeter, 643. 



Alpha particles, on the collision of, 

 with light atoms, 499 ; on the 

 passage of, through hydrogen, 824. 



rays, on the recombination of 



ions made by, 755. 



Amsler planimeter, on the slip - 

 curves of an, 643. 



Andrade (Dr. E. N. da C.) on the 

 wave-length of the soft gamma 

 rays from radium B, 854 ; on 

 regular surface markings in 

 stretched wires of soft metals, 

 869. 



Anhysteretic magnetic properties of 

 iron and nickel, on the, 357. 



Anode, on heating effects at the, 

 189. 



Antimony, on the temperature of 

 sublimation of compounds of, 1. 



Arc, on ionization in the, 277. 



Arsenic, on the temperature of sub- 

 limation of compounds of, 2. 



Ash worth (Dr. J. It.) on the an- 

 hysteretic magnetic properties of 

 iron and nickel, 357. 



Atoms, on the structure of, 257, 488, 

 541 ; on the collision of alpha 

 particles with light, 499 ; on the 

 forces between, and chemical 

 affinity, 757. 



Balance, on some modifications in an 

 ordinary, 990. 



Baly (Prbf. E. C. C.) on light ab- 

 sorption and fluorescence, 632. 



Barton (Prof. E. H.) on ionization 

 and wireless telegraphy, 381. 



Basalt, on the thermal conductivity 

 and specific heat of, 58. 



Bateman (Dr. H.) on the classifica- 

 tion of electromagnetic fields, 

 136. 



Bessel's functions, applications of, to 

 the whispering gallery and allied 

 problems, 100. 



Bismuth, on the temperature of 

 sublimation of compounds of, 

 10. 



Bohr (Dr. X.) on the effect of electric 

 and magnetic fields on spectral 

 lines, 506. 



Books, new : Researches of the De- 

 partment of Terrestrial Magnetism, 

 222 ; Makower's Practical Mea- 

 surements in Radioactivity, 222 ; 

 Annals of the Astrophysical 

 Observatory of the Smithsonian 

 Institution, 396; James Thomson's 

 Collected Papers in Physics and 

 Engineering, 752 : U.S. Coast and 

 Geodetic Survey, 752. 



Bragg (Prof. W. H.) on the intensity 

 of the reflexion of X rays by 

 crystals, 881. 



Broek (A. van den) on nuclear 

 electrons, 455. 



Brush discharge, on the electric, in 

 weak acids and solutions, 801. 



Burton (Dr. C. V.) on an experiment 

 indicating that matter takes up no 

 room in the aether, 843. 



Calcium chloride solutions, on the 

 viscosity of, 95. 



Callendar (Prof. H. L.) on the 

 thermodvnamics of radiation, 

 870. 



Campbell (Dr. X.) on delta ray3 

 from gases, 83. 



