XIV 



CONTENTS 



LOBENTZ (H. A.) presents a paper of Dr. D. Coster: "On the use of the aiuiion 



in wireless telegraphy". 1294. 

 LVOTROPE SERIES (On the Sio-n of the Electrical Phenomenon and the Influence of) 



observed in this phenomenon. 417. 

 MAGNETIC FIELD (A thermic Eü'ect of the). Contributions to the study of lit[uid crystals. 



IV. 259. 

 MAGNETIC PROPERTIES of cubic lattices. 911. 

 MAGNITLUES (The Distribution of the absolute) among- the Stars in and about the 



Milky Way. 1st. Communication. 518. ^nd. Communication. 870. 

 MAN (On the Nervus Terminalis from) to Amphioxus. 172. 



— and apes (On the topographical relations of the Orbits in infantile and adult 

 skulls in). 277. 



MATERIAL POINTS (Deduction of the thiid virial coefHcient for) (eventually for rigid 

 spheres), which exert central forces on each other. 59'^. 



— (Development of the third virial coefficient for) (eventually rigid spheres), 

 which exert central attracting forces on each other proportioiuil with r_5or )~^. 602. 



Mathematics Arnaüd Denjoy : "Nouvelle demonstration du théorème de Jordan 

 sur les courbes planes". 125. 



— J. G. VAN DER Corput: "The primitive Divisor of xk—V'. 262. 



— Jan de Vries: ''Null-Systems in the Plane". 286. 



— Jan de Vries: "Cubic involutions of the tirst class". 291. 



— Jan de Vries : "Linear Null-Systems in the Plane". 30,?. 



— Jan de Vries : "Null-Systems determined by two linear congruences of rays". 309. 



— J. A. Schouten: 'On the direct analyses of the linear ^juantities belonging to 

 the rotntional group in three and four fundamental variables''. 327. 



— H. B. A. Bock W7NK Eli : "Observations on the development of a function in a 

 series of factorials". 428. 



— J. C. Kluyver : "On the evaluation of f (2/i-f-l)". 446. 



/ 2m 



— N. G. VV. H. Beege^ : "Deber die Teilkörper des Kreiskörpers K\e 

 Ister Teil. 454. 2ter Teil. 758. 3er Teil. 774. 



— J. A. Schouten : "On the arising of a precession-motion owing to the non- 

 euclidian linear element of the space in the vicinity of the sun". 533, 



— H. B. A. BocKwiNKEL : "Observations on the expansion of a function in a 

 series of factorials". 582. 



— J. A. Schouten: "On the number of degrees of freedom of the geodetically 

 moving system and the enclosing euclidian space with the least possible number 

 of dimensions". 607. 



— L. E. J. Brouwer : "Ueber eineindeutige, stetige Transformationen von Flachen 

 in sich". 6ste Mitteilung. 707. 



— L. E. J. Brouwer: "Eemark on the plane translation theorem". 935. 



— L. E. J. Brouwer: "Ueber topologische Involutionen". 1143. 



— J. Droste : "On integral equations connected with differential equations". 1269. 



— L. E. J. Brouwer: "Aufzahlung der periodischen Transformationen des Torus". 1352. 



