x CONTENTS. 
INVERSION (The) of carvon and eucarvon in earvacrol and its velocity. 63. 
ION-REACTION (A few observations on autocatalysis and the transformation of y- 
hydroxy-acids, with and without addition of other acids, conceived as an). 760. 
ISOMORPHY (On miscibility in the solid aggregate condition and) with carbon com- 
pounds. 658. 
JAEGER (f, M.). On Benzylphtalimide and Benzylphtal-iso-imide.- 77. 
— On the preservation of the crystallographical symmetry in the substitution of 
position isomeric derivatives of the benzene series. 191. 
— On miscibility in the solid aggregate condition and isomorphy with carbon 
compounds. 658. 
— On Orthonitrobenzyltoluidine. 666. 
— On position-isomeric Dichloronitrobenzenes. 668. 
JANSE(J. M.). An investigation on polarity and organ-formation with Caulerpaprolifera.420. 
JONKER (H. G.). Contributions to the knowledge of the sedimentary boulders in 
the Netherlands. 1. The Hondsrug in the province of Groningen. 2. Upper 
silurian boulders. Ist Communication: Boulders of the age of the eastern Baltic 
zone G. 500, 2nd Communication: Boulders of the age of the eastern Baltic zones 
H and Z. 692. 
JULIUS (w. H.). Dispersion bands in absorption spectra. 134, 
— Spectroheliographic results explained by anomalous dispersion. 140. 
— Dispersion bands in the spectra of 3 Orionis and Nova Persei. 323. 
KAMERLINGH ONNES (H.) presents a paper of B. Mritin«: “On the measure- 
ment of very low temperatures. VII. Comparison of the platinum thermometer 
with the hydregen thermometer. 290, VIII. Comparison of the resistance of gold 
wire with that of platinum wire.” 300. 
— presents a paper of Dr. J. E‚ Verscuarrett; “The influence of admixtures on 
the critical phenomena of simple substances and the explanation of TercuNer’s 
experiments”, 474. 
— presents a paper of Arraur W. Gray: “Application of the Baroscope to the 
determination of the densities of gases and vapors”. 770. 
— and W. Hevse. On the measurement of very low temperatures. V. The expan- 
sion-coeflicient of Jena- and Thüringer glass between + 16° and — 182°C. 674. 
— and C, Zakrzewski, Contributions to the knowledge of van per Waals y surface, 
IX. The conditions of coexistence of binary mixtures of normal substances 
according to the law of corresponding states. 222. 
— The determination of the conditions of coexistence of vapour and liquid phases 
of mixtures of gases at low temperatures. 233. 
— The validity of the law of corresponding states for mixtures of methylchloride 
and carbon dioxide, 285, 377. 
KAP TEYN (w.). The values of some definite integrals connected with Bessel functions. 375. 
— On a series of Bessel functions. 494. 
KLUYVER (J. ©.) presents a paper of Prof. Epmunp LANDAU: “Remarks on the 
tel) 
paper of mr. KLuyver : “Series derived from the series a 66. 
