x CONTENTS 
Gases (The viscosity of liquefied). I. 840. IL. 860. ILI. 1038. IV. 1659. 
GENETICAL signification (The) of some atlas-variations. 201. 
GENOTYPIC FACTORS (On the mutual effect of). 1056. 
Geology. ©. G. S. SANDBERG: “How vulcanism might be explained”. 10. 
— G. A. F. MOLENGRAAFF. “On the occurrence of nodules of manganese in meso- 
zoic deep-sea deposits from Borneo, Timor and Rotti, their significance and mode 
ot formation”. 415. 
Geophysics. HE. van Everpincnn Jr.: ‚The propagation of sound in the atmo- 
sphere”. 933. 
GERMINATION (On the) of the seeds of some Javanese Loranthaceae. 220, 
GLUTACONIC aciD. I. 981. IL. 1527. 
GOUDRIAAN (r.) and W. Reinpers. Equilibria in the system Cu-S-O ; the roasting 
reaction process with copper. 150. 
GRANITES (On the post-carboniferous age of) of the highlands of Padang. 1513. 
GRAVITATION (On the field of two spherical fixed centres in Einstein's theory of). 760, 
HAAS (H. K. DE). Confirmation of the principle of relativity. 591. 
HAAS (W. J. pe). Further experiments on the moment of momentum existing in a 
magnet. 1281. 
— and A. Einstein. Experimental proof of the existence of Ampére’s molecular 
currents. 696. 
HAGA (H.) presents a paper of Prof. F. M. Jagcer: „Investigations on PasTEuR’s 
principle of the relation between molecular and physical dissymmetry. IT. 49. 
— presents a paper of Dr. F, ZERNIKE: „An interpolation formula for resistance- 
thermometry at low temperatures”. 914. 
HAGA (u) and F. M. JaEGer. On the symmetry of the Röntgen-patterns of trigonal 
and hexagonal erystals, and on normal and abnormal diffraction-images of bire- 
fringent crystals in general. 542. 
— On the symmetry of the Röntgen-patterns of rhombic crystals. I. 559. 
— The symmetry of the Röntgen-patterns of monoclinic crystals. 1201. 
— The symmetry of the Röntgen-patterns of tetragonal crystals, 1350. 
— On Röntgen-patterns of isomorphous crystals. 1357. 
— On tke symmetry of the Röntgen-patterns of triclinic and some rhombic crystals, 
and some remarks on the diffraction-images of quartz. 1532. 
HAMBURGER (L.) and G. Horst. Investigation of the equilibrium liquid-vapour of 
the system argon nitrogen. 872. 
HEARTMUSCLE (A study of the) according to the pharmaco-physiological method. 1588. 
HEART-RHYTHM (On the). IIL. 34. IV. 231. 
HELIUM (Further experiments with liquid). O. 493. 
HEPIALIDS (On the phylogenetic significance of the wing-markings in). 1255. 
HOEVELL (J.J L. D. BARON VAN). The phylogenetic development of the cere- 
bellar nuclei. 1421. 
HOLLEMAN (A. F.) presents a paper of Dr. EK. H. Bicuner: “The viscosity of 
colloidal solutions”. 170. } 
