KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM, 
PROCEEDINGS OF THE MEETING 
of Saturday May 31, 1902, 
Ce 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 31 Mei 1902, DI. XI). 
Ce I SS A DPS. 
J. D. vAN DER Waats: ,,Ternary systems,” IV, p. 1 
J. D. van per Waats Jr.: „Statistical electro-mechanics,’ (Communicated by Prof. J. D, 
VAN DER WAALS). p. 22. 
E. VERSCHAFFELT: „On the prussie acid in the opening buds of Prunus,’ (Communicated by 
Prof. Huco DE Vries). p. 31. 
P. ZEEMAN: „Observations on the magnetic rotation of the plane of polarisation in the interior 
of an absorption band.” p. 41. (with one plate ) 
J. W. van Wine: ,,A new method for demonstrating cartilaginous mikroskeletons,” p 47. 
H. M. Kniescuerr:.,Intramolecular rearrangement of atoms in azoxybenzene and its derivatives”, 
(Communicated by Prof. C. A. Lopry pr Bruyn). p. 51. 
P. U. Scuovre: „On the connection of the planes of position of the angles formed by two 
spaces Sn passing through a point and incident spacial systems,” p. 53. 
J. W. LANGELAAN: „fhe principle of entropy in physiology”, IL. (Communicated by Prof. 
T. Prace). p. 57. (with one plate). 
E. F. van pr SaNpe BAKHUYZEN: „On the yearly periodicity of the rates of the standard- 
clock of the observatory at Leyden, Hohwii Nr. 17,” (First Ee p. 68. 
The following papers were read: 
Physics. — “Ternary systems.“ IV. By Prof. J. D. van DER WAALS. 
(Continued from Vol. IV pag. 694). 
B. If we put 7’ —constant in equation I of our previous com- 
munication, we find the relation between dp, dv, and dy, at constant 
temperature in the following form: . 
025 075 
0. ap = “oe oa + (y,—y em Oy, 7 
: 
+ je EL er ee dee (on Re Sak car ELI 
da, + 
Proceedings Royal Acad. Amsterdam. Vol. V. 
