VI C o N T E K T S. 



INVARIANT n {ah''- (A geometrical interpret;itiou of tlie) of a binary form a-" of even 

 « + i 

 degree. 313. 



IRON (Ou an asymmetry in the change of the spectral lines of), radiating in a mag- 

 netic field. 27. 98. 



ISOMERS (On melting points in systems of optic). 46ü. 



ISOTHERMAL LINES (Measurements on the system of) near the plaitpoint and especially 

 on the process of the retrograde condensation of a mixture of carbonic iicid and 

 hydrogen. 243. 2S8. 323. 



J o A c H I M s T H A l's Circles (On the cyclographic space representation of). 1. 



KALIUM (On mixed crystals of nitrate of) and nitrate of thallium. 239. 



KAMERLINGH ON NES (h.) presents a paper of Dr. E. van Everdingen Jr. : "The 

 HALL-effect in electrolytes". 27. 



— presents a paper of Ur. E. van Everdingen Jr. : //The galvanomagnetic and 

 thermomagnetic phenomena in bismuth". 72. 404. 473. 



— presents a paper of Dr. J. Verschaefelt: //On the deviation of ue Heen's 

 experiments from van der Waals' law of continuity." 82. 



— presents a paper of Mr. Ch. M. A. Hartman: //The composition and the 

 volume of the coexisting vapour- and liquid-phases of mixtures of methylehloride 

 and carbonic acid". 83. 



— Description of a standard open manometer of reduced height with transference 

 of pressure by means of compressed gas. 154. 213. 



— present.s a paper of Dr. J. Verschaffelt: //Measurements on the system of 

 isothermal lines near the plaitpoint and especially on the' process of the retro- 

 grade condensation of a mixture of carbonic acid and hydrogen". 243. 2S8. 323. 



— presents a paper of Dr. L. H. Siertsema: //Measurements on the magnetic 

 rotatory dispersion of gases". 243. 296. 



— presents a paper of Dr. J. Verschaffelt: //Measurements on the change of 

 pressure by substitution of one component by the other in mixtures of carbonic 

 acid and hydrogen". 328. 



K L u Y V E R (j. c). On reducible hyperelliptic integrals. 448. 449. 

 korteweg (b. j.). Eeport on the 2<' International Catalogue Conference. 117. 

 LAAR (J. J. van). Calculation of the second correction to the quantity h of the 



equation of condition of van dek Waals. 273. 

 LEE (N. J. VAN D E r). The influence of pressure on the critical temperature of 



complete mixture. 15S. 

 light (Considerations concerning the influence of a magnetic field on the radiation of). 90, 

 LIQCID-PHASES (The composition and the volume of the coexisting vapour- and) of 



mixtures of methylehloride and carbonic acid. 83. 

 LIQCIDS (The equilibrium of systems of three substances, in which two) occur. 253. 

 LOBRY DE BRUYN (c. A.). The condition of substances insoluble in water 



formed in gelatine. 39. 

 ^ ■ — The rate of substitution of a nitrogroup by an oxalkyl. 144. 

 L o E E N T z (u. A.). Considerations concerning the influence of .i magnetic field 



on the radiation of liglit. 90. 



