C o N T K N 'I' S IX. 



FUNDAMENTAL VARIABLES (Oil tlie direct üiialyses of tlie linear (jiuiiitities belonging 



to the rotational gronp in three and four). 327. 

 GALACTIC CLOUD (Investigation on a) in Aquila. 1323. 



GALLIC TANNIC ACID (The mutual influence on the electrolytic conductivity of) and 

 boric acid, in connection with the composition of the tannins 907. 



OAS-BUBBLEs (Oil the shape of larsie liquid drops and) and the use made of them for 



the measurement of capillary constants. 836. 

 QAS-HYDEATES (On au Indirect Analysis of) by a Thermodynamic Method and Its 



Application to the Hydrate of Sulphuretted Hydrogen. I. 1204. II. 1338, 

 OASES (On the Heat of Disssociation of Di-atomic) in Connection with the Increased 



Valency-Attractions l^A of the Free Atoms. 644. 

 QA8SPHERE (Expansion of a cosmic), the new stars and the Cepheids, 730. 

 GELS (On the Photo-electricity of). 1146. 

 Geology. C. E. A. Wichmann: "On Tin-ore of the Island of Fiores". 409. 



— H. A. Brouwkr: 'On the Non-existence of Active Volcanoes between Pantar 

 and Dammer (East-Indian archipelago), in Connection with the Tectonic Movements 

 in this Region". 795. 



— H. A. Brouwer: "On the Age of the Igneous Rocks in the Moluccas". 803 



— H. A. Brouvter: "On Eeefcaps". 816. 



— C. E. A. Wichmann : "On the Secretion of Pho9])hates in the stems of Djati kapur 

 [Tectona grandis L.]". 968. 



— C. E. A. Wichmann : "On the Volcanoes in the Island of Tidore (Moluc- 

 cas)". 983. 



GEOMETKY (Oil the counexiou between) and mechanics in static problems. 1176. 

 geraniol (On the estimation of the) content of citronella oil. 576. 

 GRAVITATION (Calculation of some special cases, in Einstein's theory of). 68. 



G R o E N E V E LD MEYER (N. E.). V. MEYER (N. E. GkOENEVELD). 



GROWTH (Is the post-embryonal i of the nervous system due only to an increase in 

 size or also to an increase in number of the neurones? 944. 2nd. Part. 1024. 



G R Y N 8 (g.). Is there any lielation between the ('apacity of Odorous Substances of 

 Absorbing Radiant Heat and their Smell Intensity? 476. 



HAAK (j. j.) and R. Sissingh. Experimental Inquiry into the Nature of the Surface- 

 Layers in the ReHection by Mercury, and into the Diti'erence in the Optical 

 Behaviour of Liquid and Solid Mercury. 678. 



HAG A (h.) presents a paper of Dr. M. J. Huizinga : "The Unidirectional Resistance 

 of Crystal Detectors". 1248. 



— and F. Zernike. On thermoelectric currents in mercury. 1262. 



HALOS (On the ditiraction of the light in the formation of). II. A research of the 



colours observed in halo-phenomena. 1 19. 

 Hamburger (l). Contribution to the knowledge of the removal of restgases, 



especially for the electric vacuum glow-lamp. 1062. 



— (i. HoLST and E. Oosterhuis. On the influence of diU'erent substances on the 

 absorption of light by thin tungsten layers. 1078. 



