CONTENTS V 



Chemistry. J. Lifschitz: "Volta-luminescence". 561. 



— O. DE Vries: "The coagulation of Hevea latex". 675. 



— F. A. H. ScHREiNEMAKERS: "In-, mono- and divariant equilibria". 

 XXIV. 719. 



Chromium chloride (Measurements of magnetic permeabilities of) and 



gadolinium sulphate at the boiling point of liquid hydrogen in alternating 



fields of frequency 369.000 per second. 840. 

 Ciliated cell (On the determination of polarity in the epidermal). (After 



experiments on amphibian larvae). 702. 

 Ciliated epithelium (A contribution to the histophysiology of the). 707. 

 Citrate (Further researches on the antagonism between) and calcium salt 



in biochemical processes, examined by the aid of substituted citrates. 



(First comm.). 542. 

 Coagulation (The) of Hevea latex. 675. 

 Cocos-PEARL (On the nature and origin of the). 357. 

 Cohen (W. D.). The light oxidation of alcohol. III. The photo-catalytic 



influence of some series of ketones on the light oxidation of ethyl 



alcohol. 443. 

 Colloidchemistry, J. R. Katz: "Researches on the nature of the so-called 



adsorptive povifer of finely-divided carbon. I. The binding of water by 



animal carbon". 548. 

 Components (n. z-SuIfobutyric acid and its optically active). 79. 

 Congruence (1.0) (A) of twisted cubics. 126. 

 Congruence of rays (On the plane pencils containing three straight lines 



of a given algebraical"). 522. 

 CoNics (The complex of the) which cut five given straight lines. 513. 

 Constant (On Euler's). 316. 

 Continuity (On the points of) of functions. 187. 

 Coptosapelta Korth (Rubiaceae) (The genus). 361. 

 Corpus striatum (The ontogenetic development of the) in birds and a 



comparison with mammals and man. 135. 

 Crustacés décapodes nouveaux (Description de) des terrains tertiaires de 



Borneo. 489. 

 Currents (On the influence of the vagi on the frequency of the action) 



of the diaphragm during its respiratory movements. 771. 

 Curve (The critical) of oxygen-nitrogen mixtures, the critical phenomena 



and some isotherms of two mixtures with 50 "f, and 75 "„ by 



volume of oxygen in the neighbourhood of the critical point. 49. 



— (An application of the theory of integral equations on the detennina- 

 tion of the elastic) of a beam, elastically supported on its whole length. 

 237, 247. 



