VI ClOBN TLE Nees 
Chemistry. H. R. Kruyr: “The double refractive sol of vanadium pentoxide”. 1625. 
— J. Borsexen and W. D. Conen: “The photo-oxidation of alcohol with the co- 
operation of ketones”. IL. 1640. 
— J, Borseken and A. H. Kurstyens: “The hydrogen-ion-concentration of some 
complex polyhydroxyborate solutions”. 1647. 
— J. Borsexen, A. H. Kerstsens and C, B. Kramer: “The configuration of 
a-galactose and «-fructose’’. 1654. 
CINNAMIC actps (Action of sunlight on the). 181. 751. 
CIRCLES cutting a plane curve perpendicularly. I, 1449. 
CLUSTERING-TENDENCY (The) of the molecules in the critical state and the extinction 
of light caused thereby. 1520. 
COWEN (ERNST) presents a paper of DEVENDRA Naru BHATTACHARYYA and NILRATAN 
Duar: “Supersaturation and release of supersaturation”. 369. 
— presents a paper of DEVENDRA Nato BHATTACHARYYA and NiLRATAN Duar: 
“Temperature-coefficient of conductivity in alcoholic solutions, and extension of 
Koutrauscu’s hypothesis to alcoholic solutions”, 373, 
— presents a paper of Devenpra Nava BHATTACHARYYA and NILRATAN Dar: 
; “Velocity of ions at 0° C°. 375. 
— presents a paper of NiLRATAN Duar: “Properties of elements and periodic 
system”. 384. 
— The metastability of the elements and chemical compounds in consequence of 
Enantiotropy and Monotropy and its bearing on Chemistry, Physics and Technics. 
I. 961. | 
— presents a paper of Dr. Nitraran Har: “On catalysis’. Part |. 1084, Part 
IL. 1097. 
— and S. Worrr. The allotropy of sodium, L. 91. 
COHEN (w. D.) and J. BörsEKEN. The photo-oxidation of alcohol with the co-ope- 
ration of ketones. IL. 1640. 
COLLOIDAL sOLUTIONS (The viscosity of). 170. 
COLOURS (I’RESNEL’s coefficient for Jight of different). 2d part. 598. 
COMPOUNDs of the arsenious oxide. II. 126. 
CONGRUENCE (A particular bilinear) of rational twisted quintics. 39. 
CONGRUENCEs (Bilinear) of elliptic and hyperelliptic twisted quintics. 43. 
— (Bilinear) of twisted curves, which are determined by nets of cubic surfaces. 431. 
CONUS MEDULLARIS (On the) of the domestic animals. 780. 
COPPER (The roasting reaction process with). 150. 
COULOM B-FORCES (Two theorems concerning the second virial coefficient for rigid 
spherical molecules which besides collisional forces only exert) and for which 
the total charge of the active agent is zero. 868. 
CRANIOVERTEBRAL interval (On the metamerological signification of the). 191. 
CRITICAL STATE (The clustering-tendency of the molecules in the) and the extinction 
of light caused thereby. 1520. 
CROMMELIN (C. A.), H. KAMERLINGH ONNes and Miss E. I. Smip. Fsothermals of 
diatomic substances and their binary mixtures. XVIII. 465, 
