CONTENTS 1p. 
KLUYVER (3. c.). The continuation of a one-valued function represented by a 
double series. 24, 
— Borer’s formulae for divergent series. 302. 
— Approximation formulae concerning the prime numbers not exceeding a given 
limit. 599, 
LABORDE’s method (Some reflexes on the respiration in connection with) to restore 
by rhythmical traction of the tongue, the respiration suppressed in narcosis. 640, 
LAMPONG- and Sabangbay, Sumatra (Tidal constants in the). 178. 
LATITUDE (Determination of the) of Ambriz and of San Salvador (Portuguese West- 
Africa). 398. 
LIGHT (Solar Phenomena considered in connection with anomalous dispersion of). 
467. 575. 
LIPOLYTIC FERMENT in ascites-liquid of man. 406. 428. 
LIPPMANN’s capillary electrometer (On the theory of). 108. 
LIQUID (On the critical isothermal line and the densities of saturated vapour and) in 
isopentane and carbon dioxide. 574. 588. 
LIQUIDPHASES (‘The constitution of the vapourphase in the system: Water-Phenol, with 
one or with two). 645. 
LOBRY DE BRUYN (C. A.) presents a paper of Prof. A. F. HOLLEMAN : „On the 
nitration of benzoic acid and its methylic and ethylic salts.” 4. 
— presents a paper of J. J. Buanxsma: On the action of sodium mono- and 
-disulphides on aromatic nitro-compounds,” 271. 
— presents a paper of Prof. A. F. HOLLEMAN : vThe formation of trisubstituted 
derivatives from disubstituted derivatives of Benzene.” 468, 478. 
— and A. STEGER: „On the influence of water on the velocity of the formation 
of ether.” 23. 71. 
— and H. C. Bij. On isodialdane. 81. 143. 
— and W. ALBERDA VAN EKENSTEIN : /d-Sorbinose and Z-sorbinose (p-tagatose) and 
their configurations.” 268. 
LORENTZ (H. A). The elementary theory of the ZEEMAN-effect. 52. 
— Considerations on Gravitation. 559. 
MAGNETIC FIELD (The Harr-eftect and the increase of resistance of bismuth in the) at 
very low temperatures. 228. 229. 348. 
— (Some observations concerning an asymmetrical change of the spectral lines of 
iron, radiating in a). 298. 
MAGNETIC ROTATION (Measurements on the) of the plane of polarisation in oxygen at 
different pressures. 19. 
Magnetism. W. vaN BEMMELEN : /Spasms in the terrestrial magnetic force at Batavia” 
(communicated by Prof. H. KAMERLINGH ONNES). 141. 202. 
MARSDENIA TINCTORIA (On the formation of indigo from Indigoferas and from). 344. 
Mathematics. J. C. Krurver: „The continuation of a one-valued function, represented 
by a double series.” 24, 
— K. Bres: /On the formation of the resultant” (communicated by Prof. J. CARDINAAL). 85. 
— L. GEGENBAUER: „New theorems on the roots of the functions Ce)” (com- 
municated by Prof. Jan pr Vries). 196. 
