XXII 



CONTENTS 



SCHOUTEN (J. A.). On the arising of a precession-motion owing to the non-euclidian 

 inear element of the space in the vicinity of the sun. 533. 



and D. J. Struik. On the connexion between geometry and mechanics in static 



problems. 1176. 

 SCHOUTEN (w. J. a). On the Parallax of some Stellar Clusters. 2nd Communication 36. 



The Distribution of the Absolute Magnitudes among Ihe Stars in and about the 



Milky Way. 1st Communication. 518. 2nd Communication, 870. 

 SENSITIVENESS (The Limit of) in the String galvanometer. 235. 



SissiNGH (R.) and J, J Haak. Experimental Inquiry into the Nature of the Surface- 

 Layers in the Reflection by Mercury, and into the Difference in the Optical 

 Behaviour of Liquid and Solid Mercury. 678. 

 SITTER (w. DE) presents a paper of Dr. A. Pannekoek: "Expansion of a cosmic 

 o-assphere, the new stars and the Cepheids". 73i». 



presents a paper of Dr. J. Woltjer Jr. : 'The longitude of Hyperion's 



pericentre and the mass of Titan". 881. 



— Theory of Jupiter's Satellites. I. Ihe intermediary orbit". 1156. 



presents a ])aper of Dr. J. Woltjer Jr.: ''On the perturbations in the motion 



of Hyperion proportional to the first power of Titan's eccentricity". 1164. 

 presents a paper of Dr. A. Pannekoek: "Investigation of a galactic cloud in 



Aquila". 1323. 

 SiTTER'schen Koordinatensystems B (Bemerkungen iiber die Beziehungen des de) zu der 



allgemeinen Welt konstanter positiver Kriimuiung. 614. 

 SKULLS 'On the topographical relations of the Orbits in infantile and adult) in man and 



apes. 277. 

 SMELL-INTENSITY (Is there any Relation between the Capacity of Odorous Substances 



of Absorbing Radiant Heat and their). 476. 

 SMITS (a.). On the Electrochemical Behaviour of Metals. 158. 



— The Phenomenon Electrical Supertension. 375. 



— On the Phenomenon of Anodic Polarisation. II. 1349. 



and V. S. F. Berckmans. On the System Ether-Chloroform. 4U1. 



and J. M. Byvoet. On the System Iron-Oxygen. 386. 



and J. M. Bijvoet. On the Significance of the Volta-Etfect in Measurements of 



Electromotive Equilibria. 562. 



and C. A. LoBRY DE Bruyn. On the Periodic Passivity of Iron, II. 382. 



SOLID SUBSTANCE (On the Occurrence of) in Binary Mixtures with Unmixing. I. 827. 

 SPHINGIDES (The value of generic and specific characters, tested by the wingmarkings 



of). 991. 

 SPRUIT. P. PZN. (c.) On the influence of electrolytes on the motility of Chlamydomonas 



variabilis Dangeard. 782. 

 STARS (The Distribution of the Absolute Magnitudes among the) in and about the 



Milky Way. 1st Communication. 518 2nd Communication. 870. 

 STATIC PROBLEMS (On the connexion between geometry and mechanics in) 1176. 

 STATISTICAL MECHANICS (The Theory of the Hrownian Motion and) 109. 

 STELLAR CLUSTERS (On the Parallax of some). 36. 



