^.j CONTENTS 



Chemistry. A. ïSmits and V. S. F. Herckmans : "On the System Ether-Chloroform". 401. 



A. Smits and J. M. Byvoet : "On the Signiticance of the Volta-Etlect in Mea- 

 surements of Electromotive Equilibria". 562. 



A. VV. K. ÜE Jong : "On the estimnlion of the i>eraniol ooutenr of citronella 



oil". 576. 



fT. E. C. Scheffer: "On Phenyl Carbaminic Acid and its Honiologues." 664. 



— F. M. .lAEGEKand W. Thomas: "Investigations on Pasteur's Principle concerning the 

 Relation between Molecular and Crvstallonomical Dissymn.etry: XVllI. On the 

 spontaneous Fission of racemic Potassium-Cobalt i-Oxalate into its optically-active 

 Antipodes." 693. 



— J. BÖESEKEN, Miss G. VV. Tergal' aud A. C. Binnendijk: "On the influence 

 of some salts on the dyeing ot cellulose witii Benzopurpurin 4 B." 893. 



— J. 13ÖE3EKEN and \V. M. Deerns : "The mutual influence on the electrolytic 

 conductivity of gallic tannic acid and boric acid in connection with the compo- 

 sition of the tannins". 907. 



— Nil Ratan Duar: "Catalysis Part. VI. Temperature coefticients of heterogeneous 

 reactions." 1042. 



— A. VV. K.. DE .loNG : "The heterocinnamic acids of Erlenmp^er Jr". 1048. 



— F. E. C. Scheffer: "On metastable Unmixing and the Classiflcation of Binary- 

 Systems". 1055. 



— H. P. BARENDRECHT: "Urease and the radiation-theory of enzyme-action". 1. 

 1126. II. 1307. 



— A. F. Hollrman : "Eykman's llefractometric Investigations, in Connection with 

 the Presentation of the Edition of his Works". 1200. 



— F. E. C. Scheffer and G. Mever: "On au Indirect Analysis of Gas-Hydrates 

 by a Thermodynamic Method and Its Application to the Hydrate of Sulphuretted 

 Hydrogen". I. 1204. II. 13 ;8. 



— A. Smits: 'On the Phenomenon of Anodic Polarisation". U. 1349. 

 CHLAMYDOMONAS VARIABILIS ÜANGEARÜ (On the influence of electrolytes on the 



mobility of). 782 

 CHROMIUM (The Passivity of). 3rd. Communication. 138. 

 CHRONAXIA (The measurement of). 1162. 



CIRCULAR suRF.vcE (Ou the Evaporation from a) of a Liquid. 271. 

 CIS-trans isomeric substances (Determination of the Contiguration of) 80, 

 ciTRONELLA-oiL (Ou the estimation of the geraniol content ofj. 576. 

 COHEN (ERNST) presents a paper of Nil Eatan Dhar: "Catalysis". Part. VI. 



Temperature coefticients of heterogeneous reactions " ÜJ42. 

 COLLOIDAL state of solutious (Ou the spontaneous transformation to a) of odorous 



substances by exposure to ultraviolet light. 131. 

 CONFUSION (The Psychology of Conditions of). 31.'. 

 cONGELATiON-phenomena (Melting and) with para-azoxy-anisol. Contributions to the 



study of liquiti crystals. 254. 

 CONGRUENCES of rays (Null-systems determined by two linear) 309. 



