VIII GSOSNE DENS TES, 
awe (The mean radius of the), the intensity of gravity and the moon’s parallax. 1291. 
— (On isostasy, the moments of inertia and the compression of the). 1295. 
EURENPEST (P.) and H. KAMERLINGH ONNEsS. Simplified deduction of the formula 
from the theory of combinations which PrANcK uses as the basis of his radiation- 
theory. 870. 
— On interference phenomena to be expected when RÖNTGEN rays pass through a 
di-atomic gas. 1184. 
— On the kinetic interpretation of the osmotic pressure. 1241. 
EHRENFEST (T.)—APFANASSJEWA. Contribution to the theory of corresponding 
states. 840. 
EINSTEINS theory of gravitation (On the field of a single centre in). 998. 
EINTHOVEN (On the theory of the string-galvanometer of). 784. 
ELASTIC DEFORMATION (On the lowering of the freezing point in consequence 
of an). 782. 
ELECTRIC CHARGE and limit value of colloids, 623. 
pLecrropes (The effect of magnetisation of the) on the electromotive force. 745. 
ELECTROLYTE SOLUTIONS (Current potentials of) 615. 
ELECTROMAGNETS (Modern), especially for surgical and metallurgie practice. 468. 
ELECTROMETER (A new) specially arranged for radio-active investigations. 659. 
ELECTROMOTIVE FORCE (The eflect of magnetisation of the electrodes on the). 745. 
ELIAS (G. J.). On the structure of the absorption lines D, and D,. 720. 
— On the lowering of the freezing point in consequence of an elastic deforma- 
tion. 732. 
— The eftect of magnetisation of the electrodes on the electromotive force. 745. 
END-POINTS (On critical) and the system ethane-naphtalene. 1095. 
ENERGY- SURFACE (The temperature-coeflicients of the free) of liquids at temperatures 
from —80° C. to 1650° C. 1. 329. If. 365. Hl. 386. IV. 395. V. 405. VI. 416, 
VII. 555. VITL. 571. 
ENERGY-TRANSFORMATIONS during the germination of wheat-grains. 62. 
ENTROPY CONSTANT (Theoretical determination of the) of gases and liquids. 1167, 
EQUATION or sTaTE (The chemical constant and the application of the quantum theory 
by the method of the natural vibrations to the) of an ideal monatomic gas. 20. 
EQUILIBRIA (The application of the theory of allotropy to electromotive). IL. 37. IIL. 680. 
— in the system Pb—SO, the roasting reaction process. 703. 
-- in ternary systems. XV. 70. XVI. 169. XVIL 767. XVIII, 1260. 
ERRATUM. 944. 1073. 1202. 
ERRORS IN space (The theory of Bravats, on) for polydimensional space with appli- 
cations to correlation. (Continuation). 150. 
ETHANE-naphtalene (On critical end-points and the system). 1095. 
EUROPEAN sEAs (On the relation between departures from the normal in the strength 
of the trade-winds in the Atlantic Ocean and those in the waterlevel and tem- 
perature in the Northern). 1147. 
EYKMAN (c.) presents a paper of Dr. L. K. Worrr : “On the formation of antibodies 
after injection of sensitized antigens”. IL 318, 
