XXIV CIORNSTSEENSTRS: 
WICHMANN (A.) presents a paper of Dr. J. Scomurzer: “On the determination 
of the optic axial angle from the extinction angle with regard to the trace of a 
diseretional plane in a diseretional erystal-section”. 1035. 
— presents a paper of Dr. J. Scumutzer: “On the determination of an unknown 
plane from its traces in two orientated erystal-sections’. 1045. 
— presents a paper of Mr. L. Rurren: “On Orbitoides in the neighbourhood of 
the Balik Papan-bay (East-coast of Borneo)”. 1122. 
WIECHERT’ astatic seismograph (On tidal forces as determined by means of). 1231. 
WINAWER (B) and P. Zeeman, Tie magnetic separation of absorption lines in 
connection with sun-spot spectra. 2nd part. 35. 3rd part. 162. 
WIND (c. u.). Diffraction of a single pulse wave through a slit according to Ktrcu- 
HOFF’s theory. 394, On the final integral occurring in this paper. 405. 
WINKLER (cC.) presents a paper of Prof. G. van Riynperk: “Unisegmental reflex- 
reactions’. 715. 
— A tumour in the pulvinar thalami optici. A contribution to the knowledge of 
the vision of forms. 928. 
— presents a paper of Mr. J. G. Dusser pe BARENNE: “The action of strychnine 
on the central nervous system. The segmental, strictly localized strychnine- 
intoxication of the dorsal spinal mechanisms; a contribution to the dermatomery 
of the hind leg in dogs”. 1146. 
— and G. A. van RIJNBERK. Experimental researches on the segmental innervation 
of the skin in dogs. 6th Communication. 270. 7th Communication. 431. 
WISSELINGH (c. VAN). On the structure of the nucleus and karyokinesis in 
Closterium Ehrenbergii Men. 365. 
WOLFF (J.). Quadratic complexes of revolution and congruences of revolution. 1084. 
WOUDE (W. VAN DER). Double points of a c; of genus 0 or 1. 629. 
ZEEMAN-EFFECT (On the) for emission-lines in a direction oblique with regard to the 
lines of force. 391. 
ZEEMAN (P.) and B. Wrnawer. The magnetic separation of absorption lines in 
connection with sun-spot spectra. 284 part 35 3rd part. 162. 
ZEEMAN (w. P. C.). Lens measurements and Emmetropisation. 446. 
ZEYLSTRA FZN. (H. H.) On the cause of dimorphism in Oenothera nanella. 680. 
Zoology. J. Boeke and K, W. DAMMERMAN : “The Saccus vasculosus of fishes a receptive 
nervous organ and not a gland.” 186. 
— Max Weeer: “A new case of parental?care among fishes.” 583. 
— A. A. W. Husrecut: “The Eutherian and the Matherian early blastocyst”. 1077. 
— G. C. J. Vosmaer: “Observations on the genus Spirastrella’. 1132. 
ZWAARDEMAKER (H.) presents a paper of Mr. F. J. J. Buyrenpisk: “About ex- 
change of gases in cold-blooded animals in connection with their size”. 48. 
— presents a paper of Dr. A. K. M. Noyons: “Physiological sclerometry”. 312. 
— presents a paper of Mr. F. J. J. Buyrenpis«: “On the consumption of oxygen 
by the nervous system”. 577. 
— presents a paper of Mr. F. J. J. Buyrenpux: “On the negative variation of the 
nervus acusticus caused by a sound”. 649. 
— presents a paper of Mr. E. H. van HasseLT: “On the physiological effects of 
derrid”’., 688. 
