vi CON T E‚N TS: 
Chemistry. F. A. H. SCURRINEMAKERS and D. J. van Proorse: “The system sodium 
sulphate, mangane sulphate and water at 359”, 1326. 
— H. R. Kruyr: “The influence of surface-active substances on the stability of 
suspensoids”. 1344. 
CHLOROTOLUENES (On the nitration of the). 594. 
cLoups and vapours (Electric double refraction in artificial). 178. 
COEFFICIENT of diffusion (The) for gases according to O. E. Merger. 1152. 
COEFFICIENTS (On looping). 113. 
COHEN (ERNST). The equilibrium Tetragonal Tin SS Rhombic Tin. 839. 
COHERENCE-TYPE # (Some remarks on the). 1206. 
COMET HOLMES (Researches on the orbit of the periodic) and on the perturbations of 
its elliptic motion. V. 192. 
COMPONENTS (On vapour-pressure lines of the binary systems with widely divergent 
values of the vapour pressures of the). 96. 
COMPOUNDS and metals (The magneto-optic Kerr-effect in ferro-maguetic). IIL. 188. 
COMPRESSIBILITY of gases (On determinations with the volumenometer of the) under 
small pressures and at law temperatures. 299. 
— of hydrogen-vapour (On the) at and below the boiling point. 405. 
CONGRUENCEs (On loci), and focal systems deduced from a twisted cubic and a twisted 
biquadratic curve. I. 495. II. 712. [IL 890. 
COPPER (Action of hydrogenious boric acid), manganese, zinc and rubidium on the 
metabolism of Aspergillus niger. 753. 
CORRELATION (The) between atmospheric pressure and rainfall in the Wast Indian 
Archipelago in connection with the 3,5 yearly barometric period. 454. 
CORRELATION PHENOMENA (Some) in hybrids. 1004. 
CORRESPONDING STATES (The law of) for different substances, 971. 
CRAFTS (Dynamic researches concerning the reaction of IRIEDEL and). 1069. 
CROMMELIN (C. a.) and H. Kameruinen Onnes. Isotherms of monatomic sub- 
stances and of their binary mixtures. XIII. The empirical reduced equation of 
state for argon. 273. XIV. Calculation of some thermal quantities for argon, 952. 
CROMMELIN (c. A), E‚ Maratas and H. KAMERLINGH ONNEs. On the rectilinear 
diameter for argon. 667. 960. 
CRUSTAL MOVEMENTs (On recent) in the island of Timor and their bearing on the 
geological history of the East-Indian Archipelago. 224. 
crystaL (The diffraction of electromagnetic waves by a). 1271. 
curie (Madame P.) and H. KamerLiNGH Onnes. The radiation of Radium at the 
temperature of liquid hydrogen. 1430. 
curves (On a class of surfaces with algebraic asymptotic). 1363. 
— of order 3¢ (On Steinerian points in connection with systems of nine -fold 
points of plane). 938. 
pENsIty (Accidental deviations of) in mixtures. 54. 
DIAMETER (On the rectilinear) for argon. 667. 960. 
picHoTomy and lateral branching in the Pteropsida. 710. 
DIFFRACTION (The) of electromagnetic waves in a crystal. 1271. 
