Iv CONTENTS. p 
DIMEXSIONAL-sPACE (On the locus of the centre of hyperspherical curvature for the 
normal curve of #-). 527. 
DIMETHYLANILINE (On the nitration of) dissolved in concentrated sulphuric acid, 342. 
DISPERSION OF LIGHT (Solar Phenomena, considered in connection with anomalous). 
457. 575. 
DISUBSTITUTED DERIVATIVES (The formation of trisubstituted derivatives from) of 
Benzene. 468. 4:8. 
DIVERGENT SERIES (BorEL’s formulae for). 302. 
FARTH (The 14-monthly period of the motion of the pole of the) from determinations of 
the azimuth of the meridian marks of the Leiden observatory from 1882 —1896, 546, 
EARTH-QUAKES (Two) registered in Europe and at Batavia, 244. 
ECHINOPSINE, a new crystalline vegetable base. 645. 
EINTHOVEN (w,). On the theory of Lippmany’s capillary electrometer. 108. 
EKENSTEIN (W. ALBERDA VAN). See ALBERDA VAN EKENSTEIN (W.). 
ELECTROMETER (On the theory of Lippmann’s capillary), 108. 
ENaNTIOTROPY of Tin (On the). 23. 77. LI. 81. 149, IIL. 281. IV, 464. 
ENTROPY of Radiation (The). I, 308. IL. 413. 
ENZYME (Indican- its hydrolysis and the) causing the same. 512. 
EQUATIONS in which functions occur for different values of the independent variable. 534, 
ERRATUM. 141, 4(8. 
ETHER (The determination of the refractivity as a method for the investigation of the 
composition of co existing phases in mixtures of acetone and). 101, 
— (On the influence of water on the velocity of the formation of). 23. 71. 
EUROPE (Two earth-quakes registered in) and at Batavia. 244. 
EVERDINGEN JR. (E. VAN). The Hatt-effect and the increase of resistance of 
bismuth in the magnetic field at very low temperatures. 228. 229. 348. 
Eyk (c. VAN). Formation and transformation of the double salt of Silvernitrate and 
Thalliumnitrate. 468. 480, 
— and Exyst Conen: /On the Enantiotropy of Tin”. 23, 77. IL. 81. 149. 
EYKMAN (P. H.). A new graphic system of Craniology. 327. 
rat (The resorption of) and soap in the large and the small intestine. 234, 287. 
FORMATION (The) of the resultant. 85. 
FORMULAE (BoREL's) for divergent series. 302, 
— (Approximation) concerning the prime numbers not exceeding a given limit. 599, 
FRANCHIMONT (A. P. N.) presents a paper of Dr. P. van RousvrenH: „On the 
nitration of dimethylaniline dissolved in concentrated sulphuric acid.” 342, 
— presents a paper of Dr. P. van RomBuraH: /On the formation of indigo from 
Indigoferas and from Marsdenia tinctoria.” 344. 
— presents the dissertation of Dr. P. J. Monracye: /The action of hydrogen-nitrate 
upon the three isomeric chloro-benzoic acids and some of their derivatives.” 
407. 461. 
— presents a paper of Dr. M. Gresnorr: /Echinopsine, a new crystalline vegetable 
base.” 645. 
FUNCTION (The continuation of a one-valued) represented by a double series. 24. 
