KONINKLIJKE AKADEMIE VAN WETENSCIIA1TEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Friday April 26, 1907. 



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

 Afdeeling van Vrijdag 26 April 1907, Dl. XV). 



COiTTEUTS. 



J. Boeke: "Gastrulation and the covering of the yolk in the teleostean egg". (Communicated 

 by Prof. A. A. W. Httbrecht), p. 800. (With 2 plates). 



P. M. Jaeger: "On the influence which irradiation exerts on the electrical conductivity of 

 Antimonite from Japan". (Communicated by Prof. P. Zeeman), p. 809. 



B. van Tricht : "On the influence of the fins upon the form of the trunk-myotome". (Com- 

 municated by Prof. G. C. J. Vos.maer), p. 814. (With one plate). 



L. J. J. Muskens: "Anatomical research about cerebellar connections" (3rd Communication). 

 (Communicated by Prof C. Winkler), p. 819. 



S. L. van Os8 : "Equilibrium of .systems of forces and rotations in SpJ'. (Communicated by 

 Prof. P. H. Schoute), p. 820. 



J. D. van der Waals : "Contribution to the theory of binary mixtures", III, p. 826. 



C. Lelt : "Velocities of the current in a open Panama-canal", p. 849. f With 2 pi.). 



A. A. W. IIvhrecht: "On the formation of red blood corpuscles in the placenta of the flying 

 maki (Galeopithecus)", p. 873. 



55 



Proceedings Royal Acad. Amsterdam. Vol. IX. 



