CYOPNUTPEUNG TS IX 
SENSITIVITY (A moving coil galvanometer of high). 239. 
SissiNGH (R.) and C. A. Reeser. An extension of the theory of BABINET’s 
compensator. 102. 
— and C. A. REESER. The optical investigation of surface layers on 
mercury and a more refined method of observation with BABINET’s 
compensator. 108. 
SITTER (W. DE) presents a paper of Dr. A. PANNEKOEK: “The local 
starsystem.” 56. 
— presents a paper of Mr. W. H. van DEN Bos: “The orbit of 
Bu 6832 = = 1834.” 72. 
— presents a paper of Mr. C. H. Hins: “On a change with the declination 
in the personal equation in meridian-observations.” 168. 
SKELETAL MUSCLE (On the action of the novacain on the tonus of the). 185. 
SLUITER (C. PH.) presents a paper of Dr. H. BoscHMa: “On budding 
and coalescence of buds in fungia fungites and fungia actiniformis.” 257. 
Smits (A) and C. J. pr GRUYTER. The electromotive behaviour of 
aluminium. III. 86. 
SMOKES (On the hot lahar (mud flow) of the valley of ten thousand) 
(Alaska). 282. 
Sopium-vapour (An interference phenomenon due to the introduction of) 
into one of the paths of the FrzeAu-MICHELSON interferometer- 
arrangement. 206. 
SoLuTions (The use of the Zeiss waterinterferometer (RAYLEIGH-Löwe) for 
the analysis of non-aqueous). 114. 
Somatic variation (On hypotriploid dwarf-hyacinths derived from triploid 
Dutch varieties through). 251. 
Space (The condition of motion of the molecules in). 198. 
SPRONCK (C. H. H.) presents a paper of Mr. K. LANDSTEINER: “On the 
formation of heterogenetic antigen by combination of hapten and 
protein.” 237. 
STARSYSTEM (The local). 56. 
STERNUM (On the development of the) in reptiles. 221. 
STRUIK (D. J.) and J. A. SCHOUTEN. On curvature and invariants of 
deformation of a V,, in V,. 146. 
SUBSTANCES (On the law of force between the molecules of mon-atomic). 294. 
SULPHUR (On the behaviour of amorphous carbon and) at high temperatures 
and on carbon-sulphides. 92. 
SUPERPOSITION (Explanation of some interference-curves of uni-axial and 
bi-axial crystals by) of elliptic pencils. (Second paper). 195. 
