XII GON ETEN TS 
Physics. H. KAMERLINGH Onnes and C. Braax: “On the measurement of very low 
temperatures. XXI. On the standardizing of temperatures by means of boiling 
points of pure substances. The determination of the vapour pressure of oxygen 
at three temperatures”. 333. : 
— H. KAMERLINGH Onnes and J. Cray: “On the measurement of very low tem- 
peratures. XXII. The thermo-element gold-silver at liquid hydrogen temperatures”. 
344. 
— H. KaAMERLINGH Onnes and J. Cray: “On the change of the resistance of pure 
metals at very low temperatures and the influence exerted on it by small amounts 
of udmixtures.” IT, 345. 
— W. Voter: “Remarks on the Leyden observations of the ZerMax-eftect at low 
temperatures”. 360. 
— A. KEEsiNG: “On plaitpoint temperatures of the system water-phenol”. 394. 
— P. Zeeman: “The law of shift of the central component of a triplet in a 
magnetic field”. 473. 
— L. S. Ornstein: “Statistical theory of capillarity”. 526. 
— J. D. van per Waars Jr.: “On the law of the partition of energy in electrical 
systems”. 580. 
— Pu. Kounstamm: “On the course of the isobars of binary systems”. 599. 
Li 798 eae 906: 
— J. J. van Laar: “On the solid state”. 765. : 
— QO. Postma: “On the calculation of the pressure of a gas by the aid of the 
assumption of a canonical ensemble”. 781. 
— P. H. Eyxman: “New methods of stereoscopy’’. 832. 
— J. P. Daron: “Researches on the JOULE-KELviN-eftect, especially at low tem- 
peratures. I. Calculation -for hydrogen”. $63. IL. “The JouLe-KELvIN-eflect for air 
at 0° C. and at pressures up to 42 atmospheres’, 874. 
— H. KAMERLINGH ONNEs: “Methods and apparatus used in the cryogenic laboratory. 
XV, An apparatus for the purification of gaseous hydrogen by means of liquid 
hydrogen.” 883. 
— J. H. Meersure: “On the motion of a metal wire through a piece of ice”. IL 
886. 
— Pa. Kounstamm and J. Cur. Reepers: “On the phenomena of condensation 
for mixtures of carbonic acid and uretbane, in conrection with double retrograde 
condensation”. 913. 
Physiology. A. K. M. Noroxs: “About the determination of hardness in muscles’. 43. 
— J. Boeke: “On the structure of the ganglion-cells in the central nervous system 
of Branchiostoma lane.” 53. 
— A. K. M. Noyons: “About the independence of the electrocardiogram with 
regard to the form-cardiogram”. 273. ' 
— J. G. SLEEsWIJK: “Contributions to the study of serumanaphylaxis.” Ist Com- 
munication. 621, 2nd Communication. 784. 3rd Communication. 859. 
— H. J. Hamsurcrr: “The permeability of blood-corpuscles to calcium”. 718. 
— A. Kk. M. Noyons: “About observations on the electro-myogram and form- 
myogram under the influence of fatigue”. 723. 
