6 ON ft EBON TS IX 
FISHES (The physiology of the air-bladder of). 1088, 
FLOATING (The different ways of) of an homogeneous cube, 224. 
FLORES (On the tin of the island of). 474. 
FOLMER (MISS H.). A new electrometer, specially arrauged for radio-active 
investigations. 659. 
FONTAINE SCHLUITER (J. J. DE LA). v. SCHLUITER (J. J. DE LA FoNTAINE). 
FORTUYN (A. B. DROOGLEEVER). The decoloration of fuchsin-solutions by 
amorphous carbon, 1322. 
FRANCHIMONT (A. P. N.) presents a paper of Dr. R. A. Weerman: “Action 
of sodium hypochlorite on amides of g-oxyacids”, 1163. 
— and H. J. Backer. The coloration of some derivatives of Picrylmethylamide with 
alkalies, 647. 
— a-sulpho-propionic acid and its resolution into optically active isomerides. 653. 
FREEZING POINT (On the lowering of the) in connection of an elastic deformation. 732. 
FREQUENCIES (The treatment of) of directed quantities. 586. 
FRESNEL’s coefficient (On) for light of different colours. 445. 
FUCHSIN-SOLUTIONS (The decoloration of) by amorphous carbon. 1322. 
FUNCTIONS of HERMITE (On the). 1st part. 139. 
GALLE (P. H.). On the relation between departures from the normal in the strength 
of the trade-winds of the Atlantic Ocean and those in the waterlevel and tem- 
perature in the Northern European seas. 1147. 
GAs (The chemical constant and the application of the quantum theory by the method 
of the natural vibrations to the equation of state of an ideal monatomic). 20. 
— (On interference phenomena to be expected when Röntgen rays pass through a 
di-atomic). 1184. 
GAsES (The diffusion-coefticient of) and the viscosity of gas-mixtures. 1068. 
— (Theoretical determination of the entropy constant of) and liquids. 1167. 
GAS EQUILIBRIA (On) and a test of Prof. v. p. Waars Jr.’s theorema. 1. 695. IL. 1011. 
Gas-Laws (The influence of the hydration and of the deviations from the ideal) in 
aqueous solutions of salts on the solidifying and the boiling points. 1036. 
GAS-MIXTURES (The diffusion-coefficient of gases and the viscosity of). 1068. 
GELs (On the behaviour of) towards liquids and the vapours thereof. IL. 92. 
Geodesy. H. G. VAN DE SANDE BAKHUYZEN, N. WiLpeBoEr and J. W. Dieperink : 
“Comparison of the measuring bar used in the base-measurement at Stroe, with 
the Dutch Metre NO. 27”. 300. 
— H. G. van DE SANDE BAKHUYZEN: “Comparison of the platinum-iridium Metre 
No. 27 with the international Metre M as derived from the measurements by 
the Metre-Commission in 1879 and 1880, and a preliminary determination of 
the length of the measuring-bar of the French base-apparatus in international 
metres”. 311. 
Geology. H. A. Brouwer: “On the granitic area of Rokan (Middle-Sumatra) and on 
contact-phenomena in the surrounding schists”. 1190. 
Geophysics. J. P. van DER Stok: “The treatment of frequencies of directed quanti- 
ties”. 586, 
