CON Ere Ne ES 
AFRICA (Contributions to the determination of geographical positions of the West coast 
of). III. 88. Appendix. 107. 
AIR at 0°C. (The Joure-KerviN-efleet for) and at pressures up to 42 atmospheres. $74. 
ALBUMEN (The splitting up of ureum in the absence of). 513. 
AMMONIUM SULPHATE, Ammonium Chloride (The system: Copper sulphate, Copper 
chloride), and water at 30°. €15. 
Anatomy. C. Winker: “The nervous system of a white cat, deaf from its birth. A 
contribution to the knowledge of the secondary systems of the auditory nerve- 
fibres”, 225. 
— ©. Winkier and D. M. van Lonpen: “About the function of the ventral group 
of nuclei in the thalamus opticus of man”. 295. 
— A. J. P. van DEN BROEK: “About the development of the urogenital canal 
(urethra) in man”. 494. 
apparatus (An) for the purification of gaseous hydrogen by means of liquid hydrogen. 883. 
Astronomy. C. Sanpers: “Contributions to the determination of geographical positions 
on the West coast of Africa”. III, 88. Appendix. 107. 
— C. Sanpers: “Observation of the transit of Mercury on November 14, 1907 at 
Chiloango in Portuguese West-Africa”. 108. 
— J. Weeper: ‘The investigation of the weights in equations according to the 
principle of the least squares”. 142, 
— A. Brester Jz.: “The solar vortices of Hale”. 592. 
— W. pr Srrrer: “On the periodic solutions of a special case of the problem of 
four bodies”. 682. 
AVENA SATIVA (The relation between the intensity of light and the length of illumi- 
nation in the phototropic curvatures in seedlings of). 230. 
AZOTOBACTER (Fixation of free atmospheric nitrogen by) in pure culture. 67. 
BAKHUYZEN (E‚ F. VAN DE SANDE). v. SANDE DAKHUYZEN (B. F. van De) 
BARRAU (J. A). On triple systems, particularly those of thirteen elements. 290, 
— On the combinatory problem of STEINER, 352. 
BATAVIA (Eartheurrent-registration at). 242. 
— On frequencies of the mean daily cloudiness at). 366, 
— (On the duration of showers at). 555. 
BEMMELEN (W. VAN). Fartheurrent-registration at Batavia. 242. 
63 
Proceedings Royal Acad. Amsterdam. Vol. XI 
