V - DWC

NEDERL. AKADEMIE VAN WETENSCHAPPEN
PROCEEDINGS
VOLUME XLV
No. 1
President: J. VAN DER HOEVE
Secretary: M. W. WOERDEMAN
CONTENTS
ARISZ, W. H.: "Absorption and transport by the tentacles of Drosera capensis." 1.
Active transport of asparagine in the parenchym a cells of the tentacles, p. 2.
BURGERS, J. M.: "On the influence of the concentration of a suspension up oh the
sedimentation velocity (in particular for a suspension of spherical particles) ", p. 9.
WEITZENJ3ÖCK, R, und W. J. Bos: "Zur projektiven Differentialgeometrie der Regelf]ächen
im R4". (Achte Mitteilung), p. 17.
SCHOLTE, J. G.: "On the STONELEY"wave equation." I. (Communicated by Prof. J. D.
VAN DER WAALS), p. 20.
KULK, W. VAN DER: "Zur Theorie der verallgemeinerten PFAFp'schen Gleichungen."
(Communicated by Prof. J. A. SCHOUTEN), p. 26.
VEEN, S. C. VAN: "StarIe konvergente Entwicklungen für die vollständigen elliptischen
Integrale ers ter und zweiter Art." IV. (Communicated by Prof. J. G. VAN DER
CORPUT), p. 32.
VEEN, S. C. VAN: "Ueber die Entwicklung der unvollständigen elliptisch en Integrale
erster und zweiter Art in stark konvergenten Reihen." IV. (Communicated by Prof.
J. G. VAN DER CORPUT), p. 37.
MONNA, A. F.: "Sur quelques inégalités de la théorie des fonctions et leurs généralisations
spatiales." I. (Communicated by Prof. W. VAN DER WOUDE), p. 43.
BUNGENBERG DE JONG, H. G., and B. KOK: "Tissues of prismatic cells containing Biocolloids."
IV. Morphological changes of the complex coacervate gelatine + gum arabic
in consequence of a pH change of the medium flowing along the membrane. (Communicated
by Prof. H. R KRUYT), p. 51.
BUNGEN'BERG DE JONG, H. G., and E. G. HOSKAM: "Effect of neutral salts on the
composition of complex coacervate (gelatine + gum arabic) and equilibrium liquid at
constant pH and constant mixing proportion of the two colloids in the total system.
(Communicated by Prof. H. R. KRUYT), p. 59.
BUNGENiBERG DE JONG, H. G., and B. KOK: "'Tissues of prismatic cells containihg Biocolloids."
V. Morphological changes of the complex coacervate gelatine-gum arabic
owing to the addition of salts resp. non-electrolytes to the liquid ilowing past the
membrane. (With two plates.) (Communicated by Prof. J. VAN. DER HOEVE), p. 67.
BUNOEN'BERG DE JONG, H. G.: "Tissues of prisma tic cells containing BiocoUoids:" VI.
Location of coëxisting coacervates and equilibrium liquid in the ceTI·s. Morphological
model of the plant cello (Communicated by Prof. J. VAN DER HOEVE.), p. 76.
HERMES, J. J., and D. R DE VLETT:ER: '''Contribution to the petrograph,y of Bintan
(Riouw-Lingga Archipelago). (With one plate and one map.) (Communicated by
Prof. L. RUTTEN ), p. 82.
RAADSHOOVEN, B. V., and J. SWART: "On rocks from Karimon (Riouw Archipelago).
(With one map.) (Communicated by Prof. L. RUTTEN), p. 89.
HOOGENRAAD, H. R, and A. A. DE GROOT: "New observations on the feeding of
. YampyreJla lateritia (Fres.) Leidy." (Communicated by Prof. J. BOEKE), p. 97.
REVESZ, G.: "Das Problem des Ursprungs der Sprache." I. (Communicated by Prof.
A. P. H. A. DE KLEYN), p. 105.
Proc. Ned. Akad. V. Wetensch., Amsterdam, Vol. XLV, 1942.
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