COENS ENGL: Ss XV 
Physics. G. Norpsrröm: “ErNstEIN’s theory of gravitation and Herezorz’s mechanics 
of continua’. 884, 
— J. Trestine: “The equations of the theory of electrons in a gravitation field of 
Einstein deduced from a variation principle. The principal function of the 
motion of the electrons’, 892. 
— I. K. A. WERTHEIM Satomonson: “Electric current measuring instruments with 
parabolic law of deflection’. 896. 
— G. Horst: “On the equation of state of water and of ammonia”. 932, 
— A. D. Fokker: “The virtual displacements of the electro-magnetic and of the 
gravitational field in applications of Haminron’s variation principle”. 968. 
— J. D. van per Waats Jr.: “On the energy and the radius of the electron’’, 985. 
— Miss A. Sneranace: “Experimental inquiry into the laws of the BROWNTAN 
movement in a gas’. 1006. 
— H. KaMERLINGH Onnes: “Methods and apparatus used in the Cryogenic Labo- 
ratory XVII. Cryostat for temperatures between 27° K and 55° K”, 1049. 
— H. KAMERLINGH Onnes, C. A. CROMMELIN and P. G. Cars: “Isothermals of 
monatomic substances and their binary mixtures. XVIII. 1058. 
— J. E. Verscuarre.t: “The viscosity of liquefied gases”. VI. 1062. VIL. 1073. 
VIII. 1079. 
— J. E. VerscHarreLT and Cu. Nicaise: “The viscosity of liquefied gases”. 
IX. 1084. 
— J. P. Kuenen and A. L. Cuark: “Critical point, critical phenomena and a few 
condensation-constants of air”. 1088. 
— S. W. Visser: “On the diffraction of the light in the formation of halos”. 
1174. 
— L. 8. Ornstein and F. ZERNIKE: “Contributions to the kinetic theory of solids”. 
I. 1289. IL. 1295. LIT. 1304. 
— L. 8. ORNSTEIN and F. Zernike: “The influence of accidental deviations of 
density on the equation of state”. 1312. 
— W. J. H. Mout and L, S. Ornsrern: “Contribution to the research of, liquid 
erystals”. 1315. 
— L. 8. Ornstein: “The clustering tendency of the molecules at the critical 
point”. 1321. 
— H. A. Lorentz: “The dilatation of solid bodies by heat”. 1324. 
— d0, “On. Ernsrein’s theory of gravitation”. I. 1341. IL. 1354. 
Physiology. H. ZWAARDEMAKER: “The electrical phenomenon in cloudlike condensed 
odorous water vapours’ in collaboration of Messrs. H. R. Knoors and M. W. 
VAN DER BIL. 44. 
— T. P. Feenstra: “A new group of antagonizing atoms”. [. 99. LI. 341. 
— H. J. HAMBURGER: “Quantitative determination of slight quantities of SO, 
IL. Contribution to microvolumetrical analysis”. 115. 
— V. Wize: “The movements of the heart and the pulmonary respiration with 
spiders”. 162. 
— A. A. GRÜNBAUM: “On the nature and progress of visual fatigue”. 167. 
