KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM, 
PROCEEDINGS OF THE MEETING 
of Saturday November 25th, 1899, 
KET 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 25 November 1899 Dl. VIII). 
Contents: “The Harr-effect and the increase of resistance of bismuth in the magnetic field 
at very low temperatures”, I. By Dr, E. van Everpincen Jr. (Communicated by Prof. 
H. KAMERLINGH Onnxs), p. 229. — “The resorption of fat and soap in the large and 
the small intestine”. By Dr. H. J, HAMBURGER, p. 234. — “An application of the 
involutions of a higher order”. By Prof. J. CARDINAAL, p. 234. — “On some special 
cases of Moncr’s differential equation”. By Prof. W. KAPrEYN, p. 241. — “Two 
earth-quakes, registered in Europe and at Batavia”. By Dr. J. P. van per Stok, 
Ae + Bel" 
p. 244 (With one plate). — “The potential function &(r) = and 
A sin (qr +) : F 
a) =e and the potential function of vAN DER Waars”. By Dr. G. BAKKER 
a 
(Communicated by Prof. J. D. van per Waats), p. 247. — “On the systematic 
corrections of the proper motions of the Stars, contained in Auwers’-BRADLEY- 
Catalogue, and the coordinates of the Apex of the solar motion in Space”. By S. L. 
VEENSTRA (Communicated by Prof. J. C. Kaprieyn), p. 262. — „On d-sorbinose and 
l-sorbinose (-tagatose) and their configurations”. By Prof. C. A. Lopry pe Bruyn 
and W. ALBERDA VAN EKENSTEIN, p 268. — „On the action of sodium mono- and 
-disulphides on aromatic nitro-compounds”, (Preliminary communication). By J. J. 
BrLANKSMA (Communicated by Prof. C. A. Lopry pe Brtyy), p. 271. — „The alleged 
identity of red and yellow mercure oxide”. (1). By Dr, Erxsr COHEN (Communicaied 
by Prof. H. W. Baknvis RoozeBooMm), p. 273. — „The Mnantiotropy of Tin”. (III). 
By Dr. Erxsr Conen (Communicated by Prof. H. W. Bakuuis Roozegoom), p. 281. 
(With one plate). 
The following papers were read: 
Physics. — Dr. E. van EVERDINGEN Jr. “The Harr-effect and 
the increase of resistance of bismuth in the magnetic field at 
very low temperatures”. I. (Communication N°. 53 from the 
Physical Laboratory at Leiden, by Prof. H. KAMERLINGH ONNES). 
(Read October 28, 1899). 
1. In the Proceedings April 21 ’$7, p. 500 and June 26 ’97, p. 74 
measurements on the above subjects were just mentioned. These are 
17 
Proceedings Royal Acad. Amsterdam. Vol. LI. 
