CONTENTS XXIII 



STOK (J. P. VAN DER) preseuts a paper of Dr. S. W. Visser: "On the dilliaction 

 of the liü;ht in the forraatiou of halos. II. A research of the colours observed 

 in halo-phenomena." 119. 



— presents a ])iiper of Dr. C. Schoute, F. A. van Heyst and N. E. Groeneveld 

 Meyer: "An instrument to be used by the pilot of an aeroplane to measure the 

 vertical velocity of the niacliine". 468. 



string-galvanometer (The Limit of Sensitiveness in the). 235. 



struik (d. j.) and J. A. Schouten. On the connexion between geometry and 



mechanics in static problems. 1176. 

 sugars (The conduct of the kidneys towards some isomeric). Glucose, Fructose, 



Galactose, Mannose and Saccharose, Maltose, Lactose. 548. 

 sulphuretted hydrogen (On an Indirect Analysis of Gas-Hydrates by a Thermodynamic 



Method and Its Application to the Hydrate of). I. 1204. II. 1338. 

 SUN (The Scattering- of Light by Irregular Refraction in the). 115. 



— (On the arising of a precession-motion owing to the non-euclidian linear element 

 of the space in the vicinity ot the). 533. 



surface- LAYERS (Experimental Inquiry into the Nature of the) in the Reflection by 

 Mercury, and into the Ditference in the Optical Behaviour of Liquid and Solid 

 Mercury. 678. 



SURFACE-TENSIONS (On the measurement of) by means of small drops or bubbles. 366. 



TANNINS (The mutual influence on the electrolytic conductivity of gallic tannic acid 

 and boric acid in connection with the composition of the). 907. 



TEILKÖRPER (Ueber die) des Kreiskörpers K \e J. ister Teil. 454. 2ter Teil. 758. 

 3er Teil. 774. 



TELEGRAPHY (On the use of the audion in wireless). 1294. 



TEMPERATURES (On the measurement of very low). XXIX. Vapour-pressures of oxygen 

 and nitrogen for obtaining fixed points on the temperature-scale below 0° C. 656. 



TENSEUR gravifique (Le). 437. 



T E R G A u (Miss G. w. ), J. BÖESEKEN and A. C. Binnendijk. On the influence of 

 some salts on the dyeing of cellulose with Benzopurpurin 4B. 893. 



TETANUS (Tonus and faradic). 941. 



THERMAL CONDUCTIVITY (The) of neon. 342. 



THERMIC EFFECT (A) of the Magnetic Field. IV. Contributions to the study of liquid 

 crystals. 259. 



THERMOELECTRIC currents (On) in mercury. 1262. 



THOMAS (w.) and F. M. Jaeger. Investigations on Pasteur's Principle concerning 

 the Relation between Molecular and Crystallonomical Dissymmetry. VIII. On 

 the spontaneous Fission of racemic Potassiura-Cobalti-Oxalate into its optically- 

 active Antipodes. 693. 



TIDORE (Moluccas). (On the Volcanoes in the Island of). 983. 



tin (Investigation by means of X-rays of the crystalstructure of white and grey). I. 405. 



— (The structure of white) II. 494. 



— (The structure of grey). ILL 501. 



