KONINKLIJKE AKADËMIE VAN WETKNSCHAPPEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Saturday May 30, 1914. 

 Vol XVII. 



President: Prof. H. A. Lorentz. 

 Secretary: Prof. P. Zeeman. 



(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 

 Afdeeling van Zaterdag 30 Mei 1914, Dl. XXIII). 



P. RÖTHio and C. U. Arikns Kappkrs : "Furthor contributions to our knowledge ui' tlit^ 



brain of Myxine glutinosa". (Communicated by Prof. L. Boi-k), p. 2. (Witb 2 pi.). 

 H. Kamerlingii Onnes : "Further experiments with li([uid helium, J. The imitation of an 



AMPtiRE molecular current or of a permanent magnet by means of a supra-conductor", p. 12. 

 W. H. Kkesom : "The chemical constant and the application of tlie ((uantum-theory by the 



method of the natural vibrations to thn C([uation of state of an ideal monatomic gas", 



(Communicated by Prof. 11. Kamermngii Oxnes), p. 20. 

 J. Woltjer Jr.: "On Seehoer's hy])othesis about the anomalies in the motion of tin; inner 



planets". (Communicated by Prof. "W. DE Sitter), p. 2.-}. 

 W. DE Sitter: "Kemarks on Mr. Woltjer's paper concerning Seelioeu's hypothesis", p. 33. 

 A. Smits and A. H. W. Aten : "The application of the theory of allutropy to electromotive 



equilibria". II. (Communicated by Prof. J. D. van der Waals), p. 37. 

 Ernst Cohen and W. D. Helderman: "The allotropy of Cadmium". II, p. M. 

 Ern.st C'oiikn and W. D. Helderman: "The allotropy of Zinc". II, p. 59. 

 Ernst Cohen and W. D. Helderman : "The allotropy of Cuppe:-. II, ]). GO. 

 Lucie C. Dover: "Energy transformations during the germination of wheat grains". ^Com- 



municated by Prof. F. A. F. C. Went), p. G2. 

 F. A. II. Sciireinemakers: "Equilibria in ternary systems." XV, p. 70. 



H. Hulshof : "On the thermodynamic jiotential as a kinetic quantity". (First ])artj. (Commu- 

 nicated by Prof. J. D. van der Waals), p. 85. 

 L. K. Wolff and E. H. Büchner : "On the behaviour of gels towards liquids and the va])üurs 



thereof". (Communicated by Prof. A. F. Holleman), p. 92. 

 Jan dé Vries : "The ([uadruple involution of t)ie eotangential points of a cubic i)encil", p. 102. 

 Jan de Vries: "A cubic involution of the second class", p. 105. 

 W. H. Keesom : "On the manner in which the susceptibility of paramagnetic substances 



depends on the density." (Communicated by Prof. (I. Kameri-in(Jh Onnes), \\ 110. 

 Ernst Cohen and W. D. Helderm.vn : "The allotropy of Cadmium III", p. 122. 



Proceedings Royal Acad. Amsterdam. Vol. XVll. 



