o o N T F, N T S. YII 



c O II E N (ernst) and G. de IJruin. The inHiieuce of pressure on the EMF of the 



leadaccuuiuhitor. 161. 

 co II EN (ernst) and W. D. IJeldeuman. The allotropy of cadniiuni. I. 485. 



— ïhe allotropy of zinc. I. 565. 



— The allotropy of copper. I. 628. 



COHEN (w. D.) and J. Böeseken. On the reduction of aromatic ketones. 91. 11.962. 



COLLOIDS and the phase rule. 60. 



COMPONENT ATOMS (The voluiue of molecules and the volume of the). 8S0. 



COMPOUNDS (The magneto optic Kerr ell'ect in ferromagnetic). IV. 318. 



CONVERSION SALPETER (The reciprocal pairs of salts KCl + Na jS()3 ^ Na CI -|- KNO, 

 and the manufacture of). 1065^ 



COPPER (The allotropy of). I. 628. 



CORRELATION (The theory of Bravais (on errors in space) for polydimensional space, 

 with application to). 1124. 



CRITICAL DENSITY (On the) for associating substances. 1076. 



CRITICAL QUANTITIES (A nevv relation between the) and on the unity of all the sub- 

 stances in their thermic behaviour. 80S. 924. 1047. 



c ROM ME LIN (c. A.). Isothermals of monatoniic substances and their binary mixtures. 

 XV. The vapour pressure of solid and liquid argon from the critical point down 

 to -206° C. 477. 



c ROM ME LIN (c. A.) and H. Kamerlingh Onnes. Isothermals of di-atomic substances 

 and their binary mixtures. XIII. Liquid-densities of hydrogen between the boiling 

 point and the triple point ; contraction of hydrogen on freezing. 245. 



CRYOMAGNETic APPARATUS (Modification in the) of Kamerlingh Onnes and Perrier, 892. 



CRY0MAGNET1C investigation of substances (Apparatus for the general) of small suscep- 

 tibility. 689, 786. 



CRYSTAL PHASES (The occurrence of an upper critical point of mixing at the coexistence 

 of two mixed). 557. 



CRYSTAL SERIES (The metastable continuation of the mixed) of pseudo-components in 

 connection with the phenomenon of allotropy. 1167. 



CUBIC INVOLUTIONS in the plane. 974. 



curie's law (The deviations from) in connection with the zero-point energy. 432. 



CYANE (The systems phosphorus and). 27. 



CYCLOHYDROCARBONS (The stability of) in connection with their coutiguration. The 

 transformation of cyclo-hexene into benzene and cyclo-hexane. 499. 



DICHLOROACETYLENE (On). 1093. 



DIFFERENTIAL EQUATIONS (On the singular solutions of ordinary and partial) of the 



first order. 1152. 

 DIFFUSION-COEFFICIENT (The) of gases and the viscosity of gas-mixtures. 1162. 

 DiviNYLGLYCOL (On the formation of an aldehyde from s.). 336. 

 DUBOIS (eug.). On the relation between the quantity of brain and the size of the 



body in vertebrates. 647. 

 EHRENFEST (P.). A. mechanical theorem of Boltzmann and its relation to the 



theory of energy quanta. 591. 



