KONINKLIJKE AKADEMIK VAN WETENSCHAPPEN 

 TE AMSTEEDAM. 



PROCEEDINGS OF THE MEETING 



of Saturday November 29, 1913. 



Vol XVI. 



President: Prof. H. A. Lorentz. 

 Secretary: Prof. P. Zeeman. 



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

 Afdeeling van Zaterdag 29 November 1913, Dl. XXII). 



OOIsTTEIsTTS. 



II. Zwaardemaker: "On hearing apparatus examined after Lord Rayleigh's mode of 



arrangement", p. 492. 

 J. BÜESEKEN and K. H. A. Sillevis : "The stability of cyclo hydrocarbons in connection 



with their configaration. The transformation of cyclo-hexene into benzene and cyclo- 



hexane." (Contribution to the knowledge of catalytic phenomena). (Communicated by Prof. 



A. F. Holleman), p. 499. 

 J. P. VAN DER Stok: "On the relation between the cloudiness of the sky and the duration 



of sunshine", p. 507. 

 J. K. A. "Wertheim Salomonson: "Contribution to the knowledge of the string galvano- 

 meter", p. 522. 

 F. A. H. ScHREiNEMAKERS : "E(iuilibria in ternary systems" X., p. 540. 

 J. C. Thonus: "Concerning combinations of aniline with hydrochloric acid". (Communicated 



by Frof. F. A. H. Schreinemakers). p. 55-3. 

 D. F. Du Toit: "Concerning combinations of urea with acids". (Communicated by Prof. 



F. A. H. Schreinemakers), p. 555. 

 A. Smits and C. A. Lobry de Bruyn: "The occurrence of an upper critical point of 



mixing at the coexistence of two mixed crystal phases." (Communicated by Prof. J. D. 



VAN DER "Waals), p. 557. 

 Ernst Cohen and W. D. Helderman: "The allotropy of zinc." I. p. 565. 

 W. J. H. Moll : "A rapid thermopile". rCommuuicated by Prof. W. H. Julius), p. 5G8. 

 J. W. Langelaan: "Experiments on the atonical muscle". II. (Communicated by Prof. II. 



Zwaardemaker}, p. 571. 



32 



Proceedings Royal Acad. Amsterdam. Vol. XVI. 



