GLOUN TE aNT. 8% XI 
MOLYBDENITE-detector (Electrolytic phenomena of the). 512. 
MONATOMIC sUBSTANCEs (Isothermals of) and their binary mixtures. XVIIL 1058. 
MOON (Planetary motion and the motion of the) according to Einstein's theory. 367. 
MOTION (An exact method for the determination of the position of the eyes at 
disturbances of). 778. 
MOVING CENTRES (The field of ~) in EinsreriN’s theory of gravitation. 447. 
NICAISE (cH.) and J, E. Verscuarretr. The viscosity of liquefied gases. LX. 1084. 
NITRO-DERIVATIVES (On) of Alkyltoluidines and the relation between their molecular 
refractions and those of similar compounds. 564. 
NITROSAMINES (On the distinction between methylated nitro-anilines and their) by 
means of refractometric determinations. ([I) 1098. 
NODAL-CURVE (On the) of an algebraic surface. 1115. 
NORDSTROM (G.). EinsTEIN’s theory of gravitation and HeRrGLOTZ’s mechanics of 
continua. 884. 
NUCLEAR DIVISION (Some observations on periodic) in the cat. 38. 
NULL SYSTEMS (‘I'wo) determined by a net of cubics, 1124. 
NUMERICAL SERIES (On some) considered by Eurrr. 275, 
OLFACTOLOGY (The) of the methylbenzol series. 943. 
OLIE JR. (9) and A. J. Braz. RonTGun-investigation of allotropic forms. 920. 
ONNES (H. KAMERLINGH) presents a paper of Mr. J. M. Burerrs: “Note on 
P. ScHERRER’s calculation of the entropy-constant’’. 546. 
— presents a paper of G. Horsr and HE. Oosrrraurs: “Note on the melting point 
of palladium and Wren’s constant co’. 549. 
— presents a paper of S. Weser and E. Oosrrruurs: ‘On the electric resis- 
tance of thin films of metal”. 597. 
— presents a paper of G. Horst: “On the equation of state of water and of 
ammonia”. 932. 
— Methods and apparatus used in the Cryogenic Laboratory. XVII. 1049. 
— presents a paper of Prof. J. EK. Verscuarrenr: “The viscosity of liquefied 
gases’. VI. 1062. VII. 1073. VIII. 1079. 
— presents a paper of Prof. J. E. Verscuarrrnr and Cu. Nicatse: “The viscosity 
of liquefied gases”. [X. 1084. 
— C, A. OCROMMELIN and P. G. Carn. Isothermals of mon-atomic substances and 
their binary mixtures. XVI[IL 1058. 
OOSTERHUIS (E.) and G. Horsr, Note on the melting point of palladium and 
WIEN’s constant co. 549. 
OOSTERHUIS (£.) and S, Weger. On the electric resistance of thin films of metal. 
597. 
OPTICAL measurement (Direct) of the velocity at the axis in the apparatus for Fizeau’s 
experiment. 125, 
ORNSTEIN (L. s.). The clustering tendency of the molecules at the critical 
point. 1321. 
— and W. J. H. Morr. Contributions to the research of liquid crystals. 1815. 
