KONINKLIJKE AKADEmE VAN WETENSCHAPrEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Saturday March 28, 1908. 



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

 Afdeeling van Zaterdag 28 Maart 1908, Dl. XVI). 



003<rTE2srTS. 



J. C. Kaptkyx : "On the mean stur-density at different distances from the solar system", p. 626. 



i'. H. Sciioute: "On foiirdimensional nets and their sections by spaces", (2nd Part', p. 636. 

 (With 2 plates). 



J. Cakdinaal: '"Some constructions deduced from the motion of a plane system", p. 648. 



W. DK SiTTKit; "On the masses and elements of Jupiter's satellites and the mass of the 

 system." (Communi<^atcd by Prof. J. C. Kapteyn), p. 653. 



S. II. Ko:>RDr,RS : "Contribution N". 1 to the knowledge of the Flora of Java", p. 674. 



II. J. Hamburger: "A method of cold injection of organs for histological purposes", p. 687. 



P. H. Sciioi'TE: "The sections of the net of measure polytopes M of space Sp with a space 

 Spjj 1 normal to a diagonal", p. 688. 



W. EiNTiiovEN and W. A. Jolly: "The electric response of the eye to stimulation by light 

 at various intensifies", p. 698. 



II. G. VAN DE Sakde Bakhuyzen: "The height of the mean sea-level in the Y before 

 Amsterdam from 1700—1860", p. 703. 



W. DE Sitter: "On the masses and elements of Jupiter's satellites, and the mas? of the 

 system" fContinued). (Communicated by Prof. J. C. Kapteynj, p. 710. 



H. E. J. G. Du Bois, G. J. Elias and F. Lowe: "An auto-collimating spectral apparatus of 

 great luminous intensity", p. 729. 



II. E. J. G. DU Bois and G. J. Elias : "The influence of temperature and magnetisation on 

 selective absorption spectra", II, p. 734. 



H. Kameklingh Onnes: "Isotherms of monatomic substances and their binary mixtures. 

 II. Isotherms of helium at —253° C. and —259° C", p. 741. 



H. Kamerlikgh Onnes and C. Braak : "On the measurement of very low temperatures. 

 XX. Influence of the deviations from the laM- of Boyle-Charles on the temperature measured 

 on the scale of the gas-thermometer of constant volume according to observations with this 

 apparatus", p. 743. 



H. Kamerlikgh Onnes: "On the condensation of helium", p 744. 



H Kamerlingh Onnes : "Experiments on the condensation of helium by expansion", p. 744- 



43 



Proceedings Royal Acad. Amsterdam. Vol. X. 



