CONTENTS. XV 



Physics. J. 1). VAN der VVaai.s: '-Properties of the critical line (pluitpuiiit line) on 

 the side of the components." 271. 



— J. D. VAN DF.K Waals : "The properties of the sections of the surface of 

 saturation of a binary mixture, on the side of the components." 2S0. 



, J. U. VAN DEB Waals : "The exact numerical values for the properties of the 



plaitpoint line on the side of the components." 2S9. 



— C. ScHOUTE: "Determination of the Thorason-efiect in mercury". 331. 



E,. SissiNGH: " On the theory of reflection of liglit by imperfectly transparent 



bodies". 37". 

 H. A. LoRENTZ: "On the radiation of heat in a system of bodies having a 



uniform temperature". 401. 



— J. D. van der W^als Jr. ; "Remarks concerning the dynamics of the 

 electron". 477. 



— R. SissiNGH: "Derivation of tlie fundamental equations of metallic reflection 

 from Cauchy's theory". 486. 



— H. A. LoRENTZ: "The absorption and emission lines of gaseous bodies". 591. 



— O. PosTMA : "Some remarks on the quantity H in Boltmann's "Vorlesungen 

 iiber Uastheorie." " 630. 



— L. S. Ornstein : "On the motion of a metal wire through a lump of ice". 653. 



— VV. H. Julius: "A new method for determining the rate of decrease of the 

 'radiating power from tiie center toward the limb of the solar disk". 668. 



— H. B. A. BocKWiNKEL: "On the propagation of light in a biaxial crystal around 

 a centre of vibration". 728. 



— J. E. Verschaffelt: "Contributions to the knowledge of van der Waals' J,- 

 surface. X. On the possibility of predicting the properties of mixtures from those 

 of the components." 743. 



— J. E. VERScnAKFELT : "Appendix to the communications pablished in the mee- 

 tings of June 2S, September 27, 1902 and October 31, 1903". 752. 



— '■ F. M. Jaeger : ".V simple geometrical deduction of the relations between 

 known and unknown quantities, mentioned in the method of Voigt for deter- 

 mining the Gonductibility of heat in crystals". 793. 



— P. Zeeman : "Magnetic resolution of spectral lines and magnetic force". 1st part. 

 814. 



Physiology. H. Zwaardemaker: "On the pressure of sound in Corti's orsan". 60. 



— W. Einthoven: "Analysis of the curves obtained with the string galvano- 

 meter. Mass and tension of tlie ([uariz wire and resistance in the motion of the 

 string". 210. 



— G. van Eynbekk: "Tlie designs on the skin of the vertebrates, considered in 

 their connection with the theory of segmentation". 307. 



— C. A. Pekelharing : 'On the excretion of creatinin in man". 363. 



— H. J. Hamburger: "A method for determining the osmotic pressure of verv 

 small quantities of liquid". 394. 



— H. Zwaardemaker: "On the ability of distinguishing intensities of tones". 421. 



— L VAN Itallie : "On cafalases of the blood". 623. 



— L. VAN Itallie : "On the dill'erentiation of fluids of the body, containing pro- 

 teid". 628. 



