Royal Academy of Sciences. Amsterdam. 



PROCEEDINGS OF THE MEETING 

 of Saturday June 25th 1898. 



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

 Afdeeling van Zaterdag 25 Juni 1S98 T)i. VII). 



Contests: „On chemical and micioscopical examination uf autimouial alloys for axle boxes". 

 By Prof. H Beheens also in the name of Mr. H. Balcke, p. 35. — „The condition 

 of substances insoluble in water formed in gelatine". By Prof C. A. Lorky de Bruyn, 

 p. 39. — 5, On the notion of the Pole of the Earth accordinpr to the observations of the 

 years 1890 — 1896". By Dr. E. F. van db Sakde Bakhuyzen (communicated by Prof- 

 il. G. VAK UE Sande Bakhutzen) p. 42. — „On a ö-cellar quadrant-electrometer and 

 on the measurement of the intensity of electric cunents made with it". By Prof. H. Hagaj 

 p. 36. (With 1 plate). — „On the influence of the dimensions of the source of light in 

 diffraction phenomena of Fbesnel and on the dilTraction of X-rays". (3d communication) 

 By Dr. C. H. Wind (communicated by Prof II. Haga), p. 65. — „The galvanoniagnetic 

 and thermomagnetic phenomena in bismuth". By Dr. E. van Everdingen Jk. (com- 

 municated by Prof H. Kameblingii Onnes), p. 72. — „On the deviation of de Ueen's 

 e.xperiments from van deb Waai.s' law of continuity." By Dr. J. Vebschaffklt 

 (communicated by Prof. H. Ka.mehlingh Onnes), p. 82. — „The composition and the 

 volume of the coexisting vapour- and liquid-phases of mixtures of methylchloride and 

 carbonic-acid". By Cn. M. A- Hartm.vn (communicated by Prof H. Kamerungh 

 Onnes), p. 83 . (With 1 plate). — „Considerations concerning the influence of a 

 magnetic field on the radiation of light". By Prof. H. A. Lorentz, p. 90. — „On an 

 asymmetry in the change of the spectral lines of iron, radiating in a magnetic field". 

 By Dr. P. Zeeman, p. 98. 



The following papers were read : 



Chemistry. — „On chemical and microscopical examination of 

 antiraonial alloys for axle boxes." By Prof. H. Behrens 

 also iu the name of Mr. H. Baucke. 



By the direction of the „HoU. IJz. Spoorweg-M'J'' several cushions 

 of Babbits-metal (82 "j^ Sn, 9 o/^ Sb, 9 o/o Cu) were put aside for 

 chemical and microscopical examination. Alloys of this kind, when 

 slowly cooling from a melting heat, will split up into a nearly 

 amorphous mother liquor, rich in tin, into rectangular crystals (pro- 

 bably cuboidal rhombohedrons) of an aMoy of tin and antimony and 

 into a whitish bronze, forming radial clusters of brittle rods, com- 

 posed of hexagonal plates. 



3 



Proceedings Royal Acad. Amsterdam. Vol. I. 



