KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
PROCEEDINGS OF THE MEETING 
of Saturday December 28, 1901. 
DOE 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 28 December 1901, Dl. X). 
Contents: “Contributions to the knowledge of van per Waars' p-surface, V. The dependence 
of the plait-point constants on the composition in binary mixtures with small 
proportions of one of the components”. By W. H. Kresom. (Communicated by Prof. 
H. KAMERLINGH ONNES), p. 293. — “On function and structure of the trunkdermatoma”. 
(ID. By Prof. C. Winker and Dr. G. van RIJNBERK, p. 308. — “The shape of an 
empiric isothermal of a binary mixture”. By Dr. Pu. A. KOHNSTAMM. (Communicated 
by Prof. J. D. van per Waars), p. 520. — “Factorisation of large numbers”, (I). 
By F. J. Vars. (Communicated by Prof. P. H. ScHourr), p. 326, (with one plate). — 
“A formula for the volume of the prismoid”. By Prof. JAN DE VRIES, p. 337. — 
“The dispersion of the magnetic rotation of the plane of polarisation in negatively 
rotating salt-solutions, II. Further measurements with potassium ferricyanide’. By 
Dr. L. H. Srertsema. (Communicated by Prof. H. KAMERLINGH ONNES), p. 339. — 
“A new law concerning the relation of stimulus and effect”. By Prof. J. K. A. WERTHEIM 
SaLomonson (Communicated by Prof. C. WINKLER, p. 341, (with one plate). 
The following papers were read: 
Physics. — W. H. Keresom: “Contributions to the knowledge of 
VAN DER WAALS’ w-surface. V. The dependence of the 
plait-point constants on the composition in binary mixtures 
with small proportions of one of the components.” (Commu- 
nication N°. 75 from the Physical Laboratory at Leiden by 
Prof. H. KAMERLINGH ONNES). 
S 1. In § 2 of Communication N°. 59a (Proceedings June 1900 
p. 276) KAMERLINGH ONNES has drawn attention to the question 
as to how far, for the study of VAN DER WAALS’ w-surfaces, we can 
avail Aone of the law of corresponding states by ang this 
to the homogeneous phases (stable and unstable) of mixtures of 
20 
Proceedings Royal Acad. Amsterdam. Vol. LV. 
