KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 



of Saturday May 29, 1915. 



Vol. XVIll. 



President: Prof. H. A, LORENTZ. 

 Secretary: Prof. P. Zeeman. 



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

 Natuurkundige Afdeeling van Zaterdag 29 Mei 1915, Dl. XXIV). 



CONTENTS. 



J. BOEKE: "On tlic structure and the innervation nf the musculus sphincter pupillae and tlie nuisculus 



ciliaris of the bird's eye", p. 2. 

 C. G. S. SandberQ: "How volcanism nii^ht he expl.iined". (Communicated hy Prof. C. E. A. 



WICHMANN), p. 10. 

 J. WOLTJER Jr.: "Observation of the moon durins the Eclipse of the sun on Aug. 21 1914 and of the 



Transit of Mercury on Nov. 7 1914, made in the Leiden Observatory. (Communicated by Prof. 



E. F. VAN DE SANDE BAKHUYZEN), p. 16. 

 W. A. MlJSBERO: "On the structure of the muscular abdominal wall nf Primates". (Communicated 



by Prof. L. BOLK), p. 19. 

 S. DE BoER: "On the heart-rhythm". 111. (Communicated hy Prof. J. K. A. WERTHEIM SalomonsoN), 



p. 34. 

 Jan DE Vries ; "A particular bilinear congruence of rational twisted quintics", p. 39. 

 Jan DE Vries : "Bilinear congruences of elliptic and hyperelliptic twisted quintics", p. 43. 

 L. E. J. BROUWER: "Remark on inner limiting sets", p. 48. 

 F. M. JaeqeR: "Investigations on PASTEUR'S Principle of the Relation between Molecular and 



Physical Dissymmetry" II. (Communicated by Prof. H. Haoa), p. 49. (With one plate). 

 F. M. JAEOER and Jul. Kahn: "Investigations on the Temperature-Coefficients of the free Molecular 



Surface-Energy>f Liquids at Temperatures from —80° to 1650° C." IX. The Surface-Energy of 



homologous Aliphatic Amines. (Communicated by Prof. P. VAN Romburoh), p. 75. 

 ERNST COHEN and S. Wolff: "The Allotropy of Sodium" I, p. 91. 



P. VAN ROMBUROH: "Action of methylethylketone on2.3.4.6. tetranitrophenylmethylnitramine",p.98. 

 L. H. SiERTSEMA: "The magnetic rotation of the polarisation plane in titanium tetrachloride". I. 



(Communicated by Prof. H. A. Lorentz), p. 101. 

 A. Smits and S. C. Bokhorst: "On Tension Lines of the System Phosphorus". IV. (Communicated 



by Prof. J. D. VAN DER WAALS), p. 106. 

 F. A. H. SCHREINEMAKERS: "In-, mono- and divariant equilibria". I, p. 116. 

 F. A. H. SCHREINEMAKERS and Miss W. C. DE Baat: "Compounds of the ArseniousOxide", IL p. 126. 



Proceedings Royal Acad. Amsterdam. Vol. XVIII. 



