KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
PROCEEDINGS 
VOLUME XXIII 
Ne, 9. 
President: Prof. H. A. LORENTZ. 
Secretary: Prof. L. BOLK. 
(Transiated from: ‘Verslag van de gewone vergaderingen der Wis- en 
Natuurkundige Afdeeling," Vols. XXVIII and XXIX). 
CONTENTS, 
L. BOLK: “On the character of morphological modifications in consequence of affections of the 
endocrine organs”, p. 1328. 
Miss M. A. VAN HERWERDEN: “Concerning the Influence of the Adrenal Cortex upon the Growth 
and the Reproduction of Lower Organisms and its presumable Antitoxic Action”. (Communi- 
cated by Prof. C. A. PEKELHARING), p. 1339. 
J. DE HAAN and S. VAN CREVELD: “The Interchange between Blood-plasm on one hand and Humor 
aqueus and cerebro-spinal fluid on the other hand, studied from their sugar-percentages and 
in connection with the problem of combined sugar”. (Communicated by Prof. H. J. HAMBUR- 
GER), p. 1343. 
A. DE KLEYN “Experiments on the Quick component Phase of Vestibular Nystagmus in the Rabbit”. 
(Communicated by Prof. R. MAGNUS), p. 1357. 
J. M. BIJVOET and A. KARSSEN: “Research by means of Röntgen Rays on‘the Structure of the Crystals 
of Lithium and Some of its Compounds with Light Elements”. I. (Communicated by Prof. P. 
ZEEMAN), p. 1365. 
F, ROELS and J. FELDBRUGGE: “On the Development of Attention from the 8th until and including 
the 12th year of life”. (Communicated by Prof. C. WINKLER), p. 1371. 
A. A. HIJMANS VAN DEN BERGH: “Concerning Sulphaemoglobinaemia”, p. 1392. 
N. G. W. H. BEEGER: “Bestimmung der Klassenzahl aller Unterkörper des Kreiskörpers der m-ten 
Einheitswurzeln.” (Verbesserung). (Communicated by Prof. W. KAPTEYN), p. 1399. 
P. ZEEMAN, W. DE GROOT, Miss A. SNETHLAGE and G. C. DIBBETZ: “The Propagation of Light in 
Moving, Transparent, Solid Substances. III. Measurements on the Fizeau-Effect in Flint Glass”, 
p. 1402. 
H. ZANSTRA: “Motion relativated by means of a hypothesis of A. FoPPL”. (Communicated by Prof. 
P. EHRENFEST), p. 1412. 
N. H. KOLKMEIJER: “Space-time-symmetry. I. General Considerations, p. 1419. Ibid. II. Discussion of 
a special case. The tetrahedrical atom-models of LANDE, p. 1428. Ibid. III. Remarks on the 
deduction of groups of space-time symmetry operations” (Communicated by Prof. H. KAMER- 
LINGH ONNES), p. 1434. 
K. KOMURO (Nagasaki): “On Smelling during complete Exhaustion (resp. adaptation) for a given 
odour’. (Communicated by Prof. H. ZWAARDEMAKER), p. 1442. 
H. J. PRINS: “On the Acceleration of Solubility of Metals in Acids by Reducible Compounds”. 
(Communicated by Prof. J. BOESEKEN), p. 1449. 
86 
Proceedings Royal Acad. Amsterdam. Vol. X XIII. 
