KONINKLIJKE AKADEMIË VAN WETENSCIIArrEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Saturday March 28, 1903. 



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

 Afdeeling van Zaterdag 28 Maart 1903, Dl. XI). 



J. J. VAN Laar: "The meltingpoint-line of Tin-Amalgams" (Conimunicatecl by Prof. II. W. 

 Bakhuis Roozeboom), p, 511. 



A. W. NiEUWENHUiS: "Influence of changed conditions of life on the physical and psychical 

 development of the population of Central Borneo", p, 525. 



P. H. SciiouTE : "Relations between diagonals of parallelotopes", p. 540. 



E. Cohen and Tir. Strenc.ers: "On the atomic weight of Antimony (Communicated by Prof. 

 W. H. JuLirs), p. 543, (with one plate). 



E. Cohen and C. A. Lobry de Brtyn: "The conductive power of hydrazine and of substances 

 dissolved therein"' (Communicated by Prof. C. A. Lobry de Brui"n), p. 551. 



A. II. J. Belzeu: "The velocity of transformation of tribroomphenol bromine into tetrabro- 

 mophenol" (Communicated by Prof. C. A. Lobry' de Bruy-n), p. 556. 



J. H. Bonnema: "Some new Under-Cambrian Erratic Blocks from the Dutch Diluvium (Com- 

 municated, by Pi-of. J. W. Moll), p. 564. 



J. J. VAN Laar : "On the course of the values of 6 for hydrogen, in connection with a recent 

 formula of Prof, van der Waals." (Communicated by Prof. J. D. van der Waals), p. 573. 



W. H. JuLivs: "Peculiarities and changes of FRAUNHOFEU-lines interpreted as consecincnces 

 of anomalous dispersion of sunlight in the corona", p. 589. 



P. Tesch: "On the refractive index of rock-glasses" (Communicated by Prof. J. L. C. Schuoeder 

 VAN DER Kolk), p. 602, (witli one plate). 



G. B. HoGENRAAD: "On an "Eisenrose" of the St. Gotthard". (Communicated by Prof. J. L. C. 



SC'HROEDER VAN DER KOLK), p. 605. 



II. A. LoRENTZ: "Contributions to the theory of electrons, I. p. 608. 



H. IvAMERLiNGH Onnes : "Methods and apparatus used in the cryogenic Laboratory". Ill 

 ''continued) IV, V. p. 628. 



H. Kamerlingh Onnes and H. H. Fran^ is Hynd.man : "Isotherms of diatomic gases and tlieir 

 binary mixtures. V, An accurate volumenometer and mixing apparatus", p. 636, (with 2 plates) 



The following papers were read : 



Chemistry. — ''Tlie meUbuiiwint-luie of Tln-Amahiams.'" By 

 Dr. J. J. VAN Laar. (Coiiimiuiicated by Prof. H. W. Bakhuis 

 Roozeboom). (2""^^ Comimuiication). 



(Communicated in the meeting of January 31, 11)03). 



1. In a previons eommnnication (Proc*. Dec. J 902) I showed, that 

 when the molecular potenlial of I in in a licpiid liii-anialgain is ex- 

 pressed by the formula 



35 



Proceedings Royal Acad. Amsterdam. Vol. V. 



