KONINKLIJKE AKADËMIE VAN WETENSCHAPPEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Saturday March 28, 1914. 

 Vol XVI. 



Vice-President: Prof. D. J. Kortewp^g. 

 Secretari/: Prof. P. Zeeman. 



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

 Afdeeling van Zaterdag 28 Maart 1914, Dl. XXII). 



002vrTE3srTS. 



J. J. VAN Laar: "A new relation between the critical quantities, and on the unity of all 

 sub.stances in their thermic behaviour". (Communicated by Prof. H. A. Lorentz), p. 024. 



n. J. E. Betii: "The envelope of the osculating ellipses, wliich are described by the repre- 

 sentative point of a vibrating mechanism having two degrees of freedom of nearly ecpial 

 frequencies". (Communicated by Prof. D. J. Korteweg), p. 938. (With one plate). 



S. be Boer : "On the reflectorical influence of the thoracal autonoraical nervous system on the 

 rigor mortis in cold-blooded animals". (Communicated by Prof. C. A. Pekelharing), 

 p. 952. 



J. BÖESEivEN and W. D. Cohen: "On the reduction of aromatic ketones". II. (Communicated 

 by Prof. A. F. Holleman), p. 962. 



A. «I. VAN Peski : "On a new method of preparing earboxylic anhydrides". (Communicated 

 by Prof. S. Hoogewerff), p. 069. 



W. P. A. JoNKER: "Connexion between the adsorption-isotherm and the laws of PRorsxand 

 Henry". (Communicated by Pi-of. P. A. H. Sciirkinemakkrs), p. 970. 



Jan; i>e Vries : "Cubic involutions in the plane", p. 074. 



H. Kameri.ingh Onnes : "Further experiments with liciiiid helium I. The Hall-effect, and the 

 magnetic change in resistance at low temi)eratuies. IX. Tlie appearance of galvanic resistance 

 in supraconductorf-, which arc brought iiito a magnetic field, at a threshold value of the 

 field', p. 987. 



J. K. A. Werthei.m Salomonson : "Electrocardiograms of surviving human Embryo.s", p. 992. 



H. A. Brouwer: "On homoeogeneous inclusions of Kawah Idjen, Goentoer and Krakatau and 

 their connection with the surrounding eruptive rocks". (CommuDi"ated by Prof. G. A. F. 

 Molengraaff), p. 995. 



A. Smits, A. Kettner and A. L. W. de Gee : "On the pyrophoric phenomenon in metals." 

 (Communicated by Prof. J. D. van der Waals), p. 999. 



A. Smits : "Answer to Prof. E. Cohen to his observations under the title of Allotropy and 

 Electromotive Eciuilibrium". (Communicated by Prof. ,J. D. v.\n der Waal.s), p. 1002. 



60 



Proceedings Royal Acad. Amsterdam. Vol. XVI. 



