KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
PROCEEDINGS OF THE MEETING 
of Saturday June 28, 1902. 
———__- 5 Co 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 28 Juni 1902, DI. XI). 
ER ORE: bs MTS: 
Eve. Dusors: “The geological structure of the Hondsrug in Drenthe and the origin of that 
ridge”, (Ist. Part Communicated by Prof. K. Marri), p. 93, (2nd. Part Communicated by 
Prof. H. W. Baxuvis RoozrBoom), p. 101. 
G. C. J. Vosmarr: “On the shape of some siliccous spicules of sponges”, p. 104. 
J. D. van DER WAALS Jr.: ,,Statistical electro-mechanics,” II. (Communicated by Prof. J. D. 
VAN DER WAALS). p. 114. 
J. D. VAN DER WAALS: ,,Ternary systems,’ V, p. 121. 
J. H. Boxnema: “Cambrian erratic-bloeks at Hemelum in the South-West of Frisia”. (Com- 
municated by Prof. J. W. Morr), p. 140. 
G. van Iverson Jr: “Accumulation experiments with denitrifying bacteria’. (Communicated 
by Prof. M. W. Brrerinck), p. 148, (with one plate). 
W. H. Jurivs: “An hypothesis on the nature of solar prominences”, p. 162. 
C. A. Losry pe Bruyn and J. W. Diro: “The boilingpoint-curve of the system: hydrazine 
+ water”, p. 171. 
C. A. Lospry pe BRUYN and W. ALBERDA VAN EKENSTEIN: “Formaldehyde(methylene)derivatives 
of sugars and glucosides”, p. 175. 
J. J. Branxsma: “The intramolecular rearrangement in halogenacetanilides and its velocity”. 
(Communicated by Prof. C. A. Lopry pr Bruyn), p. 178. 
W. Reivers: “Galvanic cells and the phase rule”. (Communicated by Prof. H. W. Baxuuis 
RoozreBoom). p. 182. 
E. F. van DE SANDE BAKHUYZEN: „On the yearly periodicity of the rates of the standard- 
clock of the observatory at Leyden, Hohwü Nr. 17,” (2nd Pari). p. 193, (with one plate). 
Erratum, p. 217. 
The following papers were read: 
Geology. — “The Geological Structure of the Hondsrug in Drenthe 
and the Origin of that Ridge.’ By Prof. Eve. Depors. (Com- 
municated by Prof. K. Martin.) 
(Communicated in the meeting of May 31, 1902). 
North-west of Eksloo, on the Hondsrug in Drenthe, remarkable 
sections of the soil are now to be seen in about fifty pits, due last 
winter on behalf of the projected Noord-Ooster Lokaal-Spoorweg. 
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Proceedings Royal Acad. Amsterdam. Vol. V. 
