CONTENTS 



INSTRUMENT (Al)) to 1)0 iised hv tlip pilot of ;ii) M-roplaiio to nip;isure the vertical 



velocity of the machine. 4fiS. 

 INTRQBAL equations (On) connected with dillerential equations. 1269. 

 INVARIANTS (Contribution to the theory of adiabatic) 1112. 

 INVOLUTIONEN (Ueber topolofvisclie). 1143. 

 lONlSATlON of argon (The). 1089. 

 IRON (On the Periodic Passivity of). II. 382. 

 iuoN-oxYGEN (On the System). 38(5. 



JAEGER (i'\ M.). Investis^ations on Pasteuii's Principle concerning the Relation between 

 'Molecular and Crystallonomical Dissymmetry. V. Optically active complex-salts of 



Iridiura-Trioxalic Acid. 203 



— and W. Thomas. h!vestiü;ations on Pasteur's Principle concerning the Relation 

 between Molecular and Crystallonomical Dissymmetry. VI. On the Fission of 

 Potassium-Khodium-Malonate into Its Optically-active Components. 215. VII. On 

 optically active Salts of the Tri-ethylenediamine Chromi-series. 225. VIII. On the 

 spontaneous Fission of racemic Potassiura-Cobalti-Oxalate into its optically-active 

 Antipodes. 693. 



J o N G (a. w. K. u e). On the estimation of the geraniol content ufcitronella-oil. 576. 



— The heterocinnamic acids of Erlfnmeyer Jr. 1048. 



JORDAN (Nouvelle demonstration du théorème de) sur les courbes planes. 125. 

 JULIUS (w. H.) presents a paper of Prof. L. S. Ornstein and F. Zernike : "The Scat- 

 tering of light by Irregular Refraction in the Sun". 115. 



— presents a paper of Dr. W. J. H, Moll and L. S. Ornstein : "Contributions 

 to the study of liquid crystals. III. Melting and congeiation-phenomeiia with 

 para-azoxy-anisol. 254. IV. A thermic Etiect of the Magnetic Field". 259. 



— presents a paper of Dr. H. C. Burger ; "On the Evaporation from a Circular 

 Surface of a Liquid". 271 



Jupiter's Satellites (The theory of) I. The intermediary orbit. 1156. 

 kamerlingh onnes (h.). v. Onnes (H. Kamerlingh). 



K APTEYN (j. c.) presents a paper of Dr. W. J. A. Schouten: "On the Parallax of 

 some Stellar Clusters". 2nd. Communication. 36. 



— presents a paper of Dr. W. J. A. Schouten : "The Distribution of the absolute 

 Magnitudes among the Stars in and about the Milky Way". 1st Communication. 

 518. 2nd. (.'ommunication. 870. 



— presents a paper of Dr. H. Nort : "The distance-correction for the plates of 

 the Harvard Map of the Sky". 1213. 



kapteyn (w.) presents a paper of Dr. N. (i W. H. Beeüer : "Ueber die Teil- 



( w) 



körper des Kreiskörpers K\e J. 454. 2ter I'eil. 758. 3er Teil 774. 

 KEESOM (w. H.) and Mrs. C. Norüström— van Leeuwen. Deduction of the third 

 virial coefficient for material points (eventually for rigid spheres), which exert central 

 forces on each other. 503. 



