C o N T K N TS XXV 



WAALS (.1. D. VAN ü E u) prcsciits !i i»:i[)er of Prof. A. Smits: "Tlie systems jjhos- 

 pliorus iind cyane". 27- 



— presents a paper of Prof. A. Smtts aiul H. Vixseboxse : "On the pseudo-system 

 metliylrliotlanitle-methyl-mustardoir'. 33. 



WAALS (j. D. VAN u E II). Oil the poiiit ill which the solid state disappears as an 

 answer to the question in liow fiir this point can be compared to the critical 

 point of a liquid. The easiest way to do this is by means of the "^ curve, 39. 



— presents a paper of Prof. J. D. van der Waals Jr. : "On the law of partition 

 of energy". III. 84. IV. 4U1. V. 1082. 



— presents a paper of Ur. F. E. C. Sciirffeh : "On the system hexane-water". 404-. 



— presents a paper of Prof. A. Smits and C A. LoniiY de Bruijn : "The occnr- 

 rence of an upper critical point of mixing at the coexistence of two mixed crystal 

 phases' . 557. 



— presents a paper of Prof. A. Smits: "The application of tlie theory ofallotropy 

 to electromotive equilibria". 699. 



— presents a paper of Prof. Ph. Kohnstamm and Mr. K. W, Walstra : "An 

 apparatus for the determination of gas isotherms up to about 3tJ00 atm". 754. 8:.'2. 



— 'I'he volume of molecules and the volume of the component atoms. 880. 



— presents a paper of Prof. A. Smits, A. Kettneu and A. L. VV. de Gee: "On 

 the pyrophoric phenomenon in metals". 999. 



— presents a paper of Prof. A. Smits : "Answer to Prof. E. Cohen to his obser- 

 vations under the title of "Allotropy and electromotive equilibrium". 1002. 



— On the critical density for associating substances. 107(5. 



— presents a paper of Prof. A. Smits : 'The metastable continuation of the mixed 

 crystal series of pseudo components in connection with the phenomenon ofallo- 

 tropy". 1167. 



— presents a paper of Prof. A. Smits, S. C. Eokhorst and J. W. Terwen : "On 

 the vapour pressure lines of the system phosphorus". I. 1174. 



waals jr. (j. d. van der). On the law of partition of energy. III. 84. IV. 401. 



V. 1082. 

 avalstra (k. w.) and Ph. Kohnstamm. An apparatus for the determination of gas 



isotherms up to about 3000 atm. 754. 822. 

 WATER (On the system hexane-). 404. 



— (Pseudoternary systems of acid anhydrides and). I. Phthalic anhidryde. 712. 

 WATERMAN (N ). Investigations into the internal secretion of the pancreas. 2. 



— Farther experimental investigations of the internal secretion of the pancreas. 248. 

 WEBER (s o 1' 11 u s). Va])our pressures at very lo\v reduced temperatures. II. The 



vapour pressure of carbon dioxide in the range from — 140° C. to about 160° C 445. 



— and H. Kamerlingh Onnes. Vapour pressures of substances of low critical 

 temperature at low reduced temperatures. 1. Vapour pressures of carbon- 

 dioxide between — 160oC. and — 183°C. 215. 



wensink (Miss d. w.) and P. van Romburgh. A new hydrocarbon from the pina- 

 cone of methylethylketone. 108Ö. 



