KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM, 
PROCEEDINGS OF THE MEETING 
of Saturday June 24th, 1899, 
BIE menne 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 24 Juni 1899 Dl. VIII). 
Contents : “On the influence of water upon the rapidity of the formation of ether from me- 
thyliodide and ethyliodide and from sodiummethylate and sodiumethylate.” By Prof. C. A. 
Lopry DE Bruyn and Dr. A. STEGER, p. 23. — “On an instance of conversion of mixture- 
erystals in a compound.” By Prof. H. W. Baxuuis RoozeBoom, p. 23. — “On the enantio- 
tropy of tin” By Dr. Ernst COHEN and Dr. C. van Erk. (Communicated by Prof. 
H. W. Baxuvis RoozeBoom), p. 23. — ,,The continuation of a one valued function 
represented by a double series.” By Prof. J. C. Ktuyver, p. 24. — “On standard gas- 
manometers” (With 2 plates). By Prof. H. KAMERLINGH ONNES). p. 29. — “The deter- 
mination of isothermals for mixtures of HCl and C, Hy.” (With one plate). By Mr. N 
Quint GzN. (Communicated by Prof. J. D. van Der Waars, p. 40.— ,,The elementary 
Theory of the Zreeman-effect. Reply to an objection of Porxcaré.” By Prof. H. A 
Lorentz, p. 52. — „On the finding back of the comet of Hormes according to the 
computations of Mr. H. J. Zwiers.” By Prof. H. G. van DR SANDE BAKHUYZEN, p. 69. 
The following papers were read: 
Chemistry. — „On the influence of water upon the rapidity of 
the formation of ether from methyliodide and ethyliodide and 
from sodiummethylate and sodiumethylate’. By Prof. C A 
Lopry DE BRUYN and Dr. A. STEGER. 
(Will be published in the Proceedings of the next meeting.) 
Chemistry. — „On an instance of conversion of mixture crystals 
in a compound”. By Prof. H. W. Bakuuts ROOzEBOOM. 
(Will be published in the Proceedings of the next mecting.) 
Chemistry. — „On the enantiotropy of Tin’. By Dr. Ernst 
COHEN and Dr. C. van Eyk (Communicated by Prof. H. W. 
Bakuuls RoOOzeBoom). 
(Will be published in the Proceedings of the next meeting.) 
a 
Proceedings Royal Acad, Amsterdam, Vol. IL. 
