C ONE Te Et Net so XLI 
SANDE BAKHUYZEN (BE. F. VAN DE). On the results of the observations of 
the Dutch eclipse-party. 85. 
— presents a paper of C. SANDERS: „Contributions to the determination of geogra- 
phical positions on the West-Coast of Africa’, 274, 
SANDE BAKHUYZEN (H. G. VAN DE) presents a paper of Dr. J. Stern S. J.: 
„On J. C. KapreyN's criticism of Atry’s method to determine the apex of the 
solar motion”. 221. 
— The relation between the brightness of a luminous point and the moments at 
which we observe its sudden appearance or disappearance, 465. 
— presents the „Preliminary Report of the Dutch expedition to Karang Sago 
(Sumatra)”. 593. 
SANDERS (c.). Contributions to the determination of geographical positions on 
the West-Coast of Africa. 274. 
SCHALKWIK (J. c.). Precise Isothermals. IL. Accuracy of the measurement of 
pressure by means of the open manometer of KAMERLINGH ONNEs. 23. III, A 
waterjacket of constant ordinary temperature. 29. IV. The calibration of piezo- 
metertubes. 35. V. The isothermal of hydrogen at 20° C. up to 60 atmospheres. 107. 
SCHEVENINGEN (Examination of specimens of sand from borings done at the works 
of the outer harbour at). 464. 
SCHOORL (N.). Urea derivatives (Carbamides) of sugars, 214. 
SCHOUTE (P. H.). Considerations in reference to a configuration of Stare. I, 203. 
IT. 251, 
— presents a paper of Mr. F. J. Vaes: /Factorisation of large numbers”. I. 326. 
IT. 425. III. 501. ; 
SCHROEDER VAN KOLK (J, L. C.) presents a paper of J. A. GRUTTERINK: 
„Examination of specimens of sand from borings done at the works of the outer 
harbour at Scheveningen”. 464. 
— STARING and the coal-question of Southern-Limburg. 639. 
SCHUH (FRED.). Plane waves of light in an homogeneous, electrically and magnetically 
anisotropic dielectric. I. 49. II. 148. 
sEA (On the supply of sodium and chlorine by the rivers to the). 388. 
SEG RE (Considerations in reference to a configuration of). I. 203. II. 251. 
SIERTSEMA (L. H.). The dispersion of the magnetic rotation of the plane of polarisation 
in negatively rotating salt-solutions. IL. Further measurements with potassium 
ferricyanide. 339. 
SJOLLEMA (B). On the influence of feeding on the composition of the fat of 
milk, 746. 
SLEEN (G VAN DER). On g-hydroxybutenoic acid (vinylglycollic acid) and its 
decompositions. 79. 
SMITS (a.). Investigations with the micromanometer, 163. 
— and L. K. Wotrr. On the repelling of the ionisation of solutions of NaOH, NagCO, 
and NaHCO, by addition of NaCl. 42. 
SODIUM (On the supply of) and chlorine by the rivers to the sea. 388, 
SOLAR ECLIPSE. See Ecuipse, 
