KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
PROCEEDINGS OF THE MEETING 
of Saturday November 30, 1912. 
—- DO 
President: Prof. D. J. Kortnwse. 
Secretary: Prof. P. ZEEMAN. 
(Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 30 November 1912, DI. XXI. 
CVS, ZEE ASN US. 
A. Smits and H. L. pr Leeuw: “The system tin”. (Communicated by. Prof. A. F. HorLEMAN), 
p. 676. 
A. Suits and S. C. Boxnorst: “The phenomenon of double melting for fats”. (Communicated 
by Prof. A. F. HOLLEMAN), p. 681. 
A. Suits and A. Kerryer: “On the system ammonium sulphoeyanate thioureum water”. (Com- 
municated by Prof. A. F. Horreman), p. €83. 
C. van Wissetixcu: “On the demonstration of carotinoids in plants. Second communication : 
Behaviour ot carotincids with regard to reagents and solvents”, p. 686. Third communi- 
cation: “The leaf of Urtica dioica L., the flower of Dendrobium thyrsiflorum Rehb. fil. 
and Ifaematococcus pluviales Flot”. (Communicated by Prof. J. W. Morr), p. 693. 
F A. H. Scurememakers: “Equilibria in ternary systems” I, p. 700. 
J. C. Scnoure: “Dichotomy and lateral branching in the Pte opsida”’, p. 710. 
Hx. pe Vries: “On loci, congruences and focal systems deduced from a twisted eubie and 
a twisted biquadratic curve” IT, p. 712. 
L. J. J. Musxens: “The posterior longitudinal fascicle, and the manege movement’. (Com— 
municated by Prof. C. Wink irr), p. 727. (With one table). 
H. A. Brouwer: “On the formation of primary parallel structure in lujaurites”” (Communi- 
cated by Prof. MOLENGRAAFF), p. 734. 
L. J. H. M. Kressexs: “Form and function of the trunkdermatome tested bv the strychnine- 
segmentzones”. (Communicated by Prof. WINKLER), p. 740. (With one plate). 
IL. J. WATERMAN: “Action of hydrogenious, boric acid, copper, manganese, zine and rubidium 
on the metabolism of Aspergillus niger”. (Communicated by Prof. M. W. BrIJERINCK), 
p. 753. (With one table). 
ERNESTINE DE Necri and C. W. G. Mizremer: “On a micro-organism grown in two cases 
of uncomplicated Malignart Granuloma”. (Communicated by Prof. C. H. H. SPRONCK), p. 765. 
(With one plate). 
J. F. Sinks: “Measurements on the ultraviolet magnetic rotation in gases”. (Communicated by 
Prof. H. KAMERLINGH ONNES), p. 773. 
44 
Proceedings Royal Acad. Amsterdam. Vol. XV. 
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