KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
FrOCeeDINGs 
VOLUME XXIII 
Nani: 
President: Prof. H. A. LORENTZ. 
Secretary: Prof. P. ZEEMAN. 
(Translated from: “Verslag van de gewone vergaderingen der Wis- en 
Natuurkundige Afdeeling,” Vol. XXVIII and XXIX). 
CONTENTS. 
GUSTAV STIASNY: “Ueber westindische Tornarien nebst einer Uebersicht über die bisher bekannten 
tentaculaten Tornarien”. (Communicated by Prof. J. BOEKE), p. 2. (Mit 2 Tafeln). 
H. O. ANTONIUS: “Bemerkungen über einige Säugetierschädel von Sardinien”. (Communicated by 
Prof. J. F. VAN BEMMELEN). p. 37. 
NIL RATAN DHAR: “Catalysis — Part VII — Temperature Coefficient of Physiological processes”. 
(Communicated by Prof. ERNST COHEN), p. 44. 
ARNAUD DENJOY: “Sur une classe de fonctions admettant une dérivée seconde généralisée” p.50. 
C. B. BIEZENO, “Graphical Determination of the Moments of Transition of an Elastically Supported, 
Statically Indeterminate Beam”. Il. (Communicated by Prof. J. CARDINAAL), p. 60. 
J. BOESEKEN and CHR. VAN LOON: “On the determination of the configuration of cyclic cis and 
trans diols and the rearrangements of atoms and groups of atoms during chemical reactions”, 
p. 69. 
F. M. JAEGER: “On some Condensation-products of Aromatic Aldehydes and Amines”, p. 74. 
F. M. JAEGER and G. BERGER: “The Photochemical Decomposition of Potassium-cobaltioxalate 
and its Catalysis by Neutral Salts”, p. 84. 
F. M. JAEGER and J. H. DE BOER: “Colloidal Sulphurcompounds of Ruthenium”, p. 95. 
L. BOLK: “On the Index cephalicus and the absolute Dimensions of the Head of the Population 
of Holland”, p. 103. (With one plate). 
J. BRAMSON: “Experimental proof for the active dilatation of cross-striated muscle-tissue’, (Com- 
municated by Prof. G. VAN RIJNBERK), p. 111. 
J. J. VAN LOGHEM: “Identity of the blood-digestive and gelatine-liquefying bacterial actions”. (Com- 
municated by Prof. C. EYKMAN), p. 115. 
N. H. KOLKMEIJER: “Remark on the possible existence of binding rings in diamond”. (Communica- 
ted by Prof. H. KAMERLINGH ONNES), p. 120. 
. F. GOUDRIAAN: “The aluminates of sodium. Equilibriums in the system NagO—Al,0,—H,O. (Com- 
municated by Prof. J. BOESEKEN), p. 129. 
J. TRESLING: “Derivation of a formula for the temperature dependence of the velocity constants 
in gas reactions from a special image of the process”. (Communicated by Prof. H. A. LORENTZ), 
p 143. 
H. I. WATERMAN and J. GROOT: “The influence of different substances on the decomposition of 
_monoses by an aikali and on the inversion of cane sugar by hydrochloric acid”. (Communicated 
by Prof. J. BOESEKEN), p. 149. : 
P. EHRENFEST and V. TRKAL: “Deduction of the dissociation-equilibrium from the theory of quanta 
and a calculation of the chemical constant based on this”, p. 162. 
H. HULSHOF: “The osmotic pressure, regarded as a capillary phenomenon”. (Communicated by Prof. 
H. A. LORENTZ), p. 184. 
S. A. ARENDSEN HEIN: “Technical experiences in the breeding of Tenebrio molitor”. (Communi- 
cated by Prof. J. W. MOLL), p. 193. 
Proceedings Royal Acad. Amsterdam. Vol. X XIII. 
