GONTENTS Tit 
BEIJ ERINCK (M. W.) presents a paper of Mr. H. J. Waterman: “Action of hydro- 
genious boric acid, copper, manganese, zine and rubidium on the metabolism 
of Aspergillus niger”. 753. 
— On the composition of tyrosinase from two enzymes. 932. 
— presents a paper of Mr. H. J. Warsrman: “Metabolism of the nitrogen in 
Aspergillus niger.” 1047. 
— presents a paper of Mr. H. J. Warerman: “Metabolism of the fosfor in Asper- 
gillus niger”. 1058. 
— Penetration of methyleneblue into living cells after desiccation. 1086. 
— presents a paper of Dr. N. L. SÖHNGEN: “Oxydation of petroleum, paraffin, 
paraffin-oil and benzene by microbes”. 1145. 
— presents a paper of Mr. H. J. Waterman: “Potassium sulfur and magnesium 
in the metabolism of Aspergillus niger”. 1349. 
BINARY MIXTURES (Isotherms of monatomic substances and of their). XIII. Tke 
empirical reduced equation of state for argon. 273. 
— (Isotherms of diatomic gases and of their). X Control measurements with the 
volumenometer of the compressibility of hydrogen at 20° C. 295. XI. On deter- 
minations with the volumenometer of the compressibility of gases under small 
pressures and at low temperatures. 299. 
— (Isotherms of diatomic substances and of their). XII. The compressibility of 
hydrogen vapour at and below the boiling point. 405. 
BINARY SYSTEMS (On vapour-pressure lines of the) with widely divergent values ofthe 
vapour-pressures of the components. 96. 
— (Contribution to the theory of). XXL. 602. 
Biochemistry. J. Borsexen and H. J. Warerman: “A biochemical method of prepa- 
ration of J-tartaric acid”, 212 
— J. R. Karz: “The antagonism between nitrates and calcium-salts in milkeurdling 
by rennet”, 434. 
— J. R. Karz: “The laws of surface-absorption and the potential of molecular. 
attraction”. 445. 
BOEKE (J.). Nerve-regeneration after the joining of a motor nerve to a receptive 
nerve. 1281. 
BÖESEKEN (3). On a method for a more exact determination of the position of 
the hydroxyl groups in the polyoxy compounds. 216. 
BOESEKEN (1) and S. C. J. Oxtvier. Dynamic researches concerning the reaction 
of FrrepEL and Crarts. 1069. 
— and H. J. Warerman. A biochemical method of preparation of /-tartaric acid. 212. 
BOIS (H. DU) presents a paper of Mr. Prerre Martin: “The magneto-optic KERre, 
effect in ferromagnetic compounds and metals”. HI. 138. 
— presents a paper of Mr. D. E. Rosperts: “The effect of temperature and trans- 
verse magnetisation on the resistance of graphite”. 148. 
— A theory of polar armatures. 330. 
BOKHORST (8. 6.) and A. SMrrs. The phenomenon of double melting of fats. 681. 
BOLK (1) presents a paper of Dr. G. P. Frers : “On the external nose of primates”. 129. 
— presents a paper of Dr. G. P. Frets: “On the Jacobson’s organ of primates”. 124, 
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