KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
SS eS 
PROCEEDINGS OF THE MEETING 
of Saturday December 24, 1910. 
IEC 
Translated from: Verslag van de gewone vergadering der Wis- en Natuurkundige 
Afdeeling van Zaterdag 24 December 1910, Dl. XIX). 
EN FEE AND TESS 
Miss J. van AmsrerL and Prof. G. van Irerson Jr.: “The temperature-optimum of physio- 
logical precesses”. (Communicated by Prof. M. W. BrIJERINCK), p. 598. 
C. A. CrOMMELIN: “Isotherms of monatomic gases and of their binary mixtures. VI. Coexisting 
liquid and vapour densitics of argon; caleclation of the critical density of argon”. (Com- 
municated by Prof. H. KAMERLINGH ONNES), p. 607. (With one plate). 
Il. KAMERLING Onnes and C. A. CROMMELING “Isotherms of monatomic gases and of their 
binary mixtures. VII. Isotherms of argon between + 20°C. and — 150°C.” p. 614. (With 
2 plates). 
A. P. N. Francnimont and J. V. Dussxy: “On the reaction products of potassium isocyanate 
and diaminoacetone hydrochloride. Amino- and ureopropylene-ureïne”, p. 625. 
W. van per Wovupe: “Double points of a cg of genus 0 or 1”. (Communicated by Prof. P. H. 
SCHOUTE), p. 629. 
J. J. van Laar: “On the solid state”, VI. (Communicated by Prof. H. A. Lorenrz), p. 636. 
(With one plate). 
F. J. J. Burstendisk: “On the negative variation of the nervus acusticus caused by a sound”. 
(Communicated by Prof. H_ ZwaarDEMAKER), p. 649. (With one plate). 
Grorck Mascen: “On quartic curves of deficiency zero with a rhamphoid eusp and a node.” 
(Communicated by Prof. JAN pr Vries), p. €52. 
L. Bork: “On the development of the Hypophysis of Primates especially of Tarsius”, p. 660. 
N. L. Sénncen: “Fat-splitting by bacteria.” (Communicated by Prof. M. W. BrIJERINCK), 
p. 667. (With 4 plates). 
H. H. Zerrsrra Fzn: “On the cause of dimorphism in Oenothera nanella”. (Communicated 
by Prof. Huco pr Vries), p. 680. (With one plate). 
J. BöEsEKEN and H. J. Prins: “The synthesis of as. heptachloropropane from tetra-chloro— 
ethylene and chloroform with the co operation of aluminium chloride”. (Communicated 
by Prof. S. Woocrwerrr), p. 685. 
E. H. van Hasse_t: “On the physiological effects of derrid”’. (Communicated by Prof. H. 
ZWAARDEMAKER), p. 688. 
Pu. Kouxstamm and L. S. ORNSTEIN: “On Nernst’s theorem of heat”, (Communicated by 
Prof. J.D. vaN per Waars), p. 700. 
G. van RujxBerK: “Unisegmental reflex-reactions”. (Communicated by Prof. C. Wink Ler), 
p- 715. 
A. F. HorrEMmaN and J. M. Srornouwer: “On the three isomeric fluorobenzenes and some 
of their derivatives’, p. 718. 
39 
Proceedings Royal Acad. Amsterdam. Vol. XIII. 
