'26 ] 



INDEX to VOL. IV, 



ACETONE and chloroform, on the 

 vapour-pressures of mixtures of, 

 121. 



yEther, on motion through the, and 

 double refraction, (378. 



Air, on induced-radioactivity in, 

 352 ; on the current-density at the 

 cathode in the electric discharge 

 in, 608. 



Alkali salt- vapours, on the laws of 

 electrolysis of, 207. 



Allen (S. J.) on excited radioactivity 

 and ionization of the atmosphere, 

 704. 



Alternating currents, on the electrical 

 resistance of bismuth to, 554. 



Atmosphere, on the chemical and 

 geological history of the, 435 ; on 

 ionization of the, 704. 



Atomic weights, on a general numeri- 

 cal connexion between the. 103 : on 

 the law of, 411, 504. 



Atoms, on the weights of, 177, 281. 



Baker (W. C.) on the Hall effect in 

 gold for weak magnetic fields, 72. 



Barus (Dr. C.) on the sizes of water- 

 particles producing coronal and 

 axial colours in cloudy condensa- 

 tion, 24 ; on spontaneous nuclea- 

 tion and on nuclei produced by 

 shaking solutions, 262. 



Bismuth, on the electrical resistance 

 of, to alternating currents, 554 ; on 

 the resistance of thin films of, 660. 



Blake (Rev. J. F.) on a remarkable 

 inlier among the Jurassic rocks of 

 Sutherland, 423. 



Blakesley (T. H.) on a method of 

 mechanically obtaining 6 from the 

 hyperbolic trigonometrical func- 

 tions of 6, 238. 



Blue colour of the sky,on the,199,281. 



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

 of certain breccias to the physical 

 geography of their age, 419. 



Books, new : — Wolf's Histoire de 

 l'Observatoire de Paris, 171 ; 

 Rhodes's Elementary Treatise on 

 Alternating Currents, 173; Stokes's 

 Mathematical and Physical Papers, 

 277 ; Geitel's Ueber die Anwend- 

 ung der Lehre von den Gasionen 

 auf die Erscheinungen der atmos- 

 pharischen Elektricitat, 278 ; Pern- 

 ter's Meteorologische Optik, 278 ; 

 Barbariu's La Geometrie non 

 Euclidienne, 278 ; Cooper's Pri- 

 maiy Batteries, 278; Lemoine's 

 G6om6trographie, 280 ; Andoyer's 

 ThSorie de la Lune, 280 ; Science 

 Abstracts, 416 ; Larmor's The 

 Scientific Writings of the late 

 George Francis FitzGerald, 513 ; 

 Blaise's A travers la Matiere et 

 l'Energie, 515 ; Wilson's Vector 

 Analysis, 614 ; Mrs. Ayrton's The 

 Electric Arc, 623; Neculcea's 

 Le Phenomene de Kerr et les 

 Phenomenes Electro - Optiques, 

 624 ; Harper's Scientific Memoirs, 

 724 ; Prof. H. A. Lorentz's Sicht- 

 bare unci Unsichtbare Bewegun- 

 gen, 725 ; Electrochemical In- 

 dustry, 725. 



Bottomley (Dr. J. T.) on radiation 

 of heat and light from heated 

 solid bodies, 560. 



Brooks (Miss H. T.) comparison of 

 the radiations from radioactive 

 substances, 1. 



Calorimeter, on an improved form 

 of coal-, 451. 



Carbon dioxide and ethane, on the 

 vapour-pressures of mixtures ofj 

 124. 



Carbon spectrum, on the effect of the 

 presence of hvdrogen on the lines 

 of the, 202. 



Carslaw (Dr. H. S.) on a problem in 

 conduction of heat, 162. 



