CONTENTS. >;ï11 



LORENTZ (h. a.) presents a paper of Dr. W. J. de Haas. "The effect of temperature 

 and transverse magnetization on the continuous-current resistance of crystallized 

 antimony". 1110. 



MAGNETIC RESEARCHES. IX. The deviations from Curie's law in connection with the 

 zero-point eneri-y. 432. X. Apparatus for the general cryomagnetic investigation 

 of substances of small susceptibility. 68'.). 78(5. XI. Modification of tiie cryoniag- 

 netic apparatus of Kamrhmngii Onnes and 1'eruieii 892. XII. The susceptibility 

 of solid oxvgen in two forms. 894. XIII. The susceptibility of liquid mixtures of 

 oxyp'en and nitrogen and the influence of the mutual distance of the molecules 

 upon paramagnetism. 901. On paramagnetism at low temperatures. 917. 



MAGNETIC RESOl.UTiON of spcctruin Hues and temperature. 158. 



MAGNETIZATION (On the) of ferro-maguctic substances consiilered in connection of a 

 zero-point energy. 454. II. 468. 



— (The etiect of temperature and transverse) on the continuous-current resistance 

 of crystallized antimony. 1110. 



MAMMALS (Velocity of the intestinal movements in dilferent). 65. 



MAN (On the change in the permeability of the red bloodcorpuscles also in). 19. 



MANGANOCARBONATE (Oxidatiou of) by microbes. 897. 



MARTIN (k). At what time the Indian Archipelago is separated from the Tethys? 921. 



MARTIN (pierre). The magneto-optic KERR-ellect in ferromagnetic compounds. 

 IV. 318. 



Mathematics. J. G. Rutgers: "Applications of Sonine's extension of Abel's integral- 

 equation". 583. 



— Jan de Vries : "Bilinear congruences and complexes of plane algebraic curves." 726. 



— Jan de Vries : "A bilinear congruence of twisted quartics of the first species". 733. 



— H. J. E. Beth : "The envelope of the osculating ellipses, which are described 

 by the representative point of a vibrating mechanism having two degrees of 

 freedom of nearly equal frequencies". 938. 



-— Jan de Vries : "Cubic involutions in the pinne". 974. 



•^ M. J. van ÜVEN : "The theory of Bravais (on errors in space) for polydimen- 

 sional space with application to correlation". 1124. 



— Hk. de Vries and G. Sciiaake : "On the singular solutions of ordinary and 

 partial dillerential equations of the first order". 1152. 



— Jan de Vries : "A bilinear congruence of rational twisted quartics". 1 iSG. 



— \V. Kapteyn: "On Heumite's functions". 1191. 



MEER (w, r. van der) and E. Laqueur. Velocity of the intestinal movements in 



mammals. 65. 

 Mendel's law of segregation (The explanation of an apparent exception to). 1021, 

 MRRiniAN oiiSERVATioNs at Greenwich (Investigation of the inequalities of ajjproxi- 



mately monthly period in the longitude of the moon, according to the). 124. Part 2. 



141. Addendum. 590. 

 MESTROM (l II. J.) and C. T. van Valkenburg. On the visual centra in the brain 



of an anojilithiilmos. 1 8(i. 

 metals (The passivity of) in the light of tlie theory of allotropy. 191. 



