XVt C o N T E N 1' S. 



O N N E s (ii. K A M E R L I N G h) presents a paper of Dr. C. A. Crommelin : "Isother- 

 nials of raonatomiQ substances and their binary mixtures. XV. The vapour pressure 

 of solid and liquid argon, from the critical point down to — 206° C." 477. 



— presents a paper of Dr. VV. H. Keesom : 'On the question whether at the 

 absolute zero entropy changes on mixing". 6()9. 



— presents a paper of Mr. E. Gosteriiuis : "Magnetic researches. XI. Modification 

 in the cryoningnetic apparatus of 'Is amehlingij Onnes and Pkriueii". 892. 



— and C. A. (Jrommelin. Isothermals of di-atomic substances and their binary 

 mixtures. Xlll. Liquid-densities of hydrogen between the boiling point and the 

 triple point; contraction of hydrogen on freezing. 245. 



— and VV. H. Keesom. The vapour pressures of hydrogen from the boiling point 

 down to near the triple point. 440. 



— and E Oosteriiuis. Magnetic researches. XIV. On paramagnetism at low 

 ten;peratures. 91 7. 



— and Albert Perrier. Magnetic researches. X. Apj.aratus for the general 

 cryomagnetic investigation of substances of small susceptibility. 689. 786. XI [, 

 The susceptibility of solid oxygen in two forms. 894. Xllt The susceptibility of 

 liquid mixtures of oxygen and nitrogen and the influence of the mutual distance 

 of tiie molecules upon paramagnetism. 901. 



— and Somius Weber. Vapour pressures of substances of low critical temperature 

 at low reduced temperatures. I. Vapour pressures of carbon dioxide between 

 — 160° C. and -183° C. 21.5. 



uosTERHUis (E,). Magnetic researches. IX. The deviations from Curie's law in 

 connection with the- zero-point energy. 432, XI. Modification in the cryomagnetic 

 apparatus of Kamerlingu Onnes and Perrier. 892. 



— and H. Kamehlingh Onnes. Magnetic researches. XIV. On paramagnetism at 

 low temperatures. 917. 



OS (Cii. u. van). On a system of curves occurring in Einstetn's theory of gravitation. 40. 

 OSMOTIC PRESSURE (On a new principle for the direct determination of). 160, 

 oxiD.iTiON of manganocarbonate by microbes* 397. 

 OXYGEN (The susceptibility of solid) in two forms. 894. 



Paleontology. J. H. Bonnema : "The orientation of the shells of Beyrichia tuber- 

 cukita Klöden sp.". 67. 

 -— J. II. Bonnema: "Contribution to the knowledge of the genus Kloedenelhi 

 Ulrich and Bassler". 1Ki5. 

 Pancreas (Investigations into the internal secretion of the). 2. 



— (Further experimental investigations of the internal secretion of tiie). 24 8. 

 PARAMAGNETISM (The susceptibility of liquid mixtures of oxygen and nitrogen, and 



the influence of the mutual distance of the molecules upon). 901. 



— (On) at low temperatures. 917. 



partition of energy (On the law of the). III. 84 IV. 401. V. 1082. 

 PERMEABILITY (On the change in the) of the red bloodcorpuscles (also in man). 19. 

 p E K E 1, HARING (c. A.) presents a paper of Mr. N. Waterman : "Investigations 

 iuto the internal secretion of the pancreas". 2. 



