VI GON T EN fs 
BROUWER (L. E. J.) presents a paper of Prof. F. BERNSTEIN: “Die Inte- 
gralgleichung der elliptischen Thetanullfunktion. 2e Note: Allgemeine 
Lösung’. 817. 
— Intuitionistische Mengenlehre. 949. 
— Besitzt jede reelle Zahl eine Dezimalbruchentwickelung ? 955. 
BuRGER (H. C.). The process of solidification as a problem of conduction 
of heat. 616. 
— Observations of the temperature during solidification. 691. 
— and P. H. van Citrert. Measurements on the intensity of spectrum 
lines by the aid of the echelon. 790. 
BuRGERS (J. M.). On the resistance of fluids and vortex motion. 774. 
— Stationary streaming caused by a body in a fluid with friction. 1082. 
BUTTERFLIES (The wing-design of mimetic). 877. 
BisLSMA (M. G.) and R. MAGNus. On the pharmacological action of 
isoamyl-hydrocuprein (eukupin) and isoctyl hydrocuprein (vuzin). 481. 
BisvoET (J. M.), A. KARSSEN and N. H. KOLKMEIJER. Investigation by 
means of x-rays of the crystalstructure of sodium-chlorate and sodium- 
bromate. 644. 
— and A. KARSSEN. Research by means of Röntgenrays on the structure 
of the crystals of lithium and some of its compounds with light 
elements. I. 1365. 
CALCIFUGE PLANTS (On the) of the inland dunes of the island of Goeree. 475. 
CALCIUMIONS (The significance of the concentration of) for the movements 
of the stomach caused by stimulation of the N. vagus 1262. 
CANALIS CRURALIS (OMBREDANNE’S theory of the “lames vasculaires” and 
the anatomy of the). 1209. 
CANE suGAR (The influence of different substances on the decomposition 
of monoses by an alkali and on the inversion of) by hydrochloric 
acid. 149. 
CAPILLARY PHENOMENON. (The osmotic pressure, regarded as a). 184. 
CARDINAAL (J.) presents a paper of Prof. C. B. Biezeno: “Graphical 
determination of the moments of transition of an elastically supported, 
statically indeterminate beam.” II. 60. 
— presents a paper of Prof. W. vAN DER WOUDE: “On the motion of 
a fixed system’. 589. 
— presents a paper of Prof. H. J. vAN VEEN: “Properties of congruen- 
ces of “rays”. 1206? 
CaraLysis. Part. VU. Temperature coefficient of physiological processes. 44. 
— Part. VIII. 299. Part. IX. Thermal and photochemical reactions. 308. 
X. Explanation of some abnormally large and small temperature 
coefficients. 313. XII. Some induced reactions and their mechanism. 1074. 
