xXx CONTENTS 
RADIO-ACTIVE investigations (A new electrometer, specially arranged for). 659. 
REFLEXES (Exaggeration of deep). 885. 
REINDERS (w.). Equilibria in the system Pb-S-O, the roasting reaction process. 703. 
RESISTANCE (On the electrical) of pure metals. IX. 508. 
RESPIRATORY CENTRE (Phagocytes and). 1325. Ee 
ROASTING REACTION PROCESS (Equilibria in the system Pb-S-O, the). 703. 
rocks (On some) of the island of Taliabu (Sula islands). 226. 
ROKAN (Middle-Sumatra) (On the granitic area of) and on contact phenomena in the 
surrounding schists. 1190. 
ROMBURGH (P. VAN) presents a paper of Prof. F. M. JAEGER and Dr. Anr. SIMEK: 
“Studies in the field of silicate-chemistry”. Il. 239, ILL, 251. 
— presents a paper of Prof. F. M. Jaraer: “The temperature-coefficients of the 
free surface-energy of liquids at temperatures from —80° to 1650° C.” I. 329. 
Il. 365. III. 386. IV. 395. V. 405. VI. 416. VII. 555, VIIL 571. 
— presents a paper of Mr. G. pr Bruin: “A crystallized component of isoprene 
with sulphur dioxide”. 585. 
— presents a paper of Prof. F. M. Jarcer: ‘Researches on PasrEUR's principle of 
the connection between molecular and physical dissymmetry”. I. 1217. 
— presents a paper of Dr. A. W. K. pr Jona: “Action of sunlight on the cin- 
namic acids’. 1274. 
— and Miss D. W. Wenstnx. On the interaction of ammonia and methylamine 
on 2.3.4,-trinitrodimethylaniline. 1034, 
RÖNTGEN RAYS (On interference phenomena to be expected when) pass through a 
di-atomic gas. 1184. 
— (On a new phenomenon accompanying the diffraction of) in birefringent 
crystals. 1204. 
ROTHIG (p.) and C. U. Artins Kappers. Further contributions to our knowledge 
of the brain of Myxine glutinosa. 2. 
RIJNBERK (G. VAN). On the nerve-distribution of the trunk-dermatoma. 632. 
SALOMONSON (J. K. A. WERTHEIM). LExaggeration of deep reflexes, 885. 
— presents a paper of Dr. S. pe Boer: “On the heart-rhythm”. 1075. LL. 1135. 
saurs (The influence of the hydration and of the deviations from the ideal gas-laws 
in aqueous solutions of) on the solidifying and the boiling point. 1036. 
SANDE BAKHUYZEN (H.G. VAN DE). v. BAKHUYZEN (H. G. VAN DE SANDE). 
SCHEFFER (F. E. C.). On gas equilibria and a test of Prof. v. p. Waars Jr's 
theorema, I. 695. IL. 1011. 
— On unmixing in a binary system for which the three-phase pressure is greater 
than the sum of the vapour tensions of the two components. 834, : 
SCHLUITER (J. J. DE LA FONTAINE) and A. A. HyMans VAN DEN BERGH. 
The identification of traces of bilirubin in albuminous fluids, 807. 
SCHREINEMAKERS (F. A. H.). Equilibria in ternary systems. XV. 70. XVI. 
169. XVII. 767. XVIII. 1260. el 
— and Miss W. C. pe Baar. The system: copper sulphate, copper chlorid, potas- 
sium sulphate, potassium chlorid and water at 30° C, 533, 
