80 “NOL aN 85 W 
Chemistry. Ernst Corner: „Studies on Inversion” (lst Part) (communicated by 
Prof. H. W. Bakuuis RoozeBoom). 618. 
— A. Smits: /Determinations of the diminution of vapour-pressure and the elevation 
of the boiling-point of dilute solutions” (communicated by Prof. H. W. BaKHUIS 
RoozeBoom). 635. 
— M. Gresnorr: /Echinopsine, a new crystalline vegetable base” (communicated 
by Prof. A. P. N. Francutmont). 645. 
— F. A. H. ScHREINEMAKERS: »The constitution of the vapourphase in the 
system: Water-Phenol, with one or with two liquidphases” (communicated by 
Prof. J. M. van BEMMELEN). 645. 
CHLORO-BENZOIC AciDs (The action of hydrogennitrate upon the three) and some of 
their derivatives. 407. 461. 
COHEN (ERNST). On a new kind of Transition elements (sixth kind). 81. 153. 
— The alleged identity of red and yellow mercuric oxide. I. 273. IL. 407. 458. 
— On the theory of the Transition cell of the third kind (1st Part). 334. 
— Thermodynamics of Standard celis (1st Part). 610. 
— Studies on Inversion (1st Part). 618. 
— andC. van Eyk: „On the Enantiotropy of Tin.” 23. 77. II. $1. 149. ILL. 281. IV. 464, 
comet of Holmes (On the finding back of the) according to the computations of 
H. J. Zwiers. 69. 
COMITANTS (On orthogonal). 485. 
COMPOUND (An example of the conversion of mixed crystals into a). 23. 74. 
CONVERSION (An example of the) of mixed crystals into a compound. 23. 74. 
COOLING (The) of a current of gas by sudden change of pressure. 379. 
COORDINATES (On the systematic corrections of the proper motions of the stars, contained 
in Auwers’-BrapLEY — Catalogue and the) of the Apex of the solar motion in 
space. 262. 
CRANIOLOGY (A new graphic system of). 327. 
CRYOGENIC LABORATORY (Methods and apparatus used in the). I. 129. IL. 406. 437. 
CRYSTALS (An example of the conversion of mixed) into a compound. 23. 74. 
— (On mixed) of Sodiumnitrate with Potassiumnitrate and of Sodiumnitrate 
with Silvernitrate. 158. 
— (Mixed) of mercuric iodide and bromide. 81. 146. 
CUNAEUS (Ee. H. J.). The determination of the refractivity as a method for the 
investigation of the composition of co-existing phases in mixtures of acetone and 
ether. 101. 
curve (On the locus of the centre of hyperspherical curvature for the normal) of 
n-dimensional space. 527. 
CURVES (On rational twisted). 421. 
— (The theorem of JoacuimstHaL of the normal). 593. 
DEDUCTION (The direct) of the capillary constant ¢ as a surface tension, 389. 
DENSITIES (On the critical isothermalline and the) of saturated vapour and liquid in 
isopentane and carbon dioxide. 574. 588. 
DIELECTRIC COEFFICIENTS (The) of liquid nitrous oxide and oxygen. 140. 211. 
DIFFERENTIAL EQUATION (On some special cases of Moxae’s). 241, 326, 525, 
