KONINiamCE AKADEMIE VAN WETENSCHAPPEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 



of Saturday September 27, 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 27 September 1913, Dl. XXII). 



C03SrTE2srTS. 



H. ZwAARDKMAKER : "Oil reinfoicement of sound and soundselection by means of micro- 

 telephone-apparatus", p. 194. 

 J. Tn. BoRKWATF.K: "On the synthesis of amido oxalylbiuiet CO Nlli 



I 

 CONHCONHCONIIo". 



(Communicated by Prof. A. P. N. Frakciiimont), p. 108. 

 P. J. H. van Ginneken: "Economic lixiviation." (Communicated by Prof. Erkst Cohen), p. 201. 

 H. Kamerlingh Onnes and Sornus Weber: "Vapour pressures of substances of low critiral 



temperature at Ion' reduced temperatures. I. V.apour pressures of carbon dioxide between 



— 160" C. and — 1830 C ", p. 215. 

 W. H. Keesom: "On the equation of state of an ideal monatomic gas according to the quan- 

 tum-theory." (Communicated by Prof. H. Kamerlingh Onnes\ p. 227. 

 W. H. Keesom : "On the theory of free electrons in metals". (Communicated by Prof. II. 



Kamerlingh Okne.s), p. 236. 

 H. Kamerlingh Onnes and C. A. Crommelin: "Isothermals of di-atomic substances ;md tlioir 



binary mixtures XIII. Licjuid -densities of hydrogen between the boiling point and the 



triple point; contraction (jf hydrogen on freezing", p. 245. 

 N. Waterman : "Further exparimentul investigations of tlie internal secretion of tlie pancreas." 



(Communicated by Prof. C. A. Pekelharing), p. 248. 

 W. II. JiTLius: "On the interpretation of jiliotosjilieric plienomcna", p. 264. 

 II. A. Brouwer: "On zonal amphiboles, in which the plane of optic axes of the margin is 



normal to that of the central p:vrr." (Communicated by Prof. G. A. F. Molenoraaff), 



p. 275. 

 W. 1)e Sitter: "On canonical elements", p. 279. 



A. Wichmann: "On the pseudometeorite of Igast in Livonia." p. 292. 

 Paul Rüthig: "Contributions upon Neurobiotaxis". i^Tlie arrangement of the motor nuclei in 



Myxinc glutinosa in Cryptobranchus Necturus, liana fusca and Bufo." (Communicated 



by Prof. L. Bolk), p. 296. 

 11. A. Vermeulen: "Note on tlie size of the dorsal motor nucleus of the X" nerve in regard 



to the development of the musculature of the stomach." (Communicated by Prof. L. Bolk;, 



p. 305. 

 A. J. Hovy: "On the relation between the quantity of white ard grey substance in the central 



neivons system," (Communicated by Prof. L. Bolk), p.. 311. 

 Pierre Martin: "The magneto-opiic IvERR-rffect in ferrom.agnetic comjiounds." IV. (Communi- 

 cated by Prof. II. DU Bois), p. 3 8. 

 L. Auisz: "On the Tyndallphenomenon in gelatin-solutions". (Communicated by Prof. II. 



Zavaardemaker", p. 33!. 

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

 demaker), p. 336. 

 P. Muller: "Ou tlie formation of an aldehyde from s. divinylglycol." (Communicated by 



Prof. P. van Eomburgh), p. 336. 

 Erratum, p. 336. 



' ^3 



Proceedings Royal Acad. Amsterdam. Vol. XVI. 



