KONINKLIJKE AKADEMIK VAN WETENSCHAPPEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Saturday November 30, 1907. 



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

 Afdeeling van Zaterdag 30 November 1907, Dl. XVI). 



CONTENTS. 



G. van Kunberk.: "On the segmental skin-innervation by the sympathetic nervous system in 

 vertebrates, based on experimental researches about the innervation of the pigment-cells in flat 

 fishes and of the pilo-motor muscles in cats". (Communicated by Prof. C. Winkler), p. 332. 



II. Kamerlingh Onnes and J. Clay: "Some remarks on the expansion of platinum at low 

 temperatures", p. 342. 



J. W. Langelaan : "On the development of the Corpus callosum in the human brain". 

 (Communicated by Prof. T. Place), p. 344. (With one plate) 



W. Kai'teyn: "On an infinite product, represented by a definite integral", p. 347. 



P. Zeeman: "Magnetic revolution of spectral lines and magnetic force", (2nd part), p. 351. 

 (With 2 plates). 



Mr. and Mrs. Docters van Leelwen-Ueynvaan: "On a double reduction of the number 

 of chromosomes during the formation of the sexual cells and on a subsequent double fertilisation 

 in some species of Polytrichum". (Communicated by Prof. F. A. F. C. Went), p. 359. 



Erratum , p. 366. 



22 



Proceedings Royal Acad. Amsterdam-, Vol. X. 



