XII CONTENTS 



Mathematics. M. J. Beunfante : "On a generalisation of Tauber's theorem 

 concerning power series". 216. 



— C. B. BlEZENO: "An application of the theory of integral equations on 

 the determination of the elastic curve of a beain, elastically supported 

 on its whole length." 237. 



— J. Droste. "Idem". 247. 



— H. D. Kloosterman : "A theorem concerning power-series in an infinite 

 number of variables, with an application to Dirichlet's series". 278. 



— J. C. Kluyver : "On Euler's constant." 316. 



— Jan de Vries : "Representation of a tetrahedral comple.x on the points 

 of space." 390. 



— M. J. Belinfante : "On power series of the form : x"» — x"! + x"-' — . . .' 

 456. 



— G. Schaake: "The complex of the conies which cut five given straight 

 lines". 513. 



— G. Schaake: "On the plane pencils containing three straight lines of 

 a given algebraical congruence of rays." 522. 



— F. KöLMEL: "Ueber die zu einem Punkte und einer Geraden gehörigen 

 Polarkurven inbezug auf eine gegebene algebraïsche Kurve." 783. 



— L. E. J. Brouwer: "Ueber den natiirlichen Dimensionsbegriff." 795. 



— R. Weitzenböck : "Ueber Invarianten von Bilinearformen." 801. 



— J. A. Schouten : "On a non-symmetrical affine field theory." 850. 

 Menarche (The) in Dutch women and its precipitated appearance in the 



youngest generation. 650. 

 Mertens' theorem (A generalisation of). 203. 



Metals (On the electric resistance of pure), etc. XII. Measurements con- 

 cerning the electric resistance of indium in the temperature field of 



liquid helium. 504. 

 Meteorology. S. W. Visser: "A non-tangent infralateral arc." 712. 

 Meunier (Fernand). Sur quelques nouveaux insectes des lignites 



oligocènes (Aquitanien) de Rott. Siebengebirge (Rhénanie). 605. 

 MiCHELS (A.). The influence of rotation on the sensitiveness and the 



accuracy of a pressure balance. 805. 

 MiLCH-cows (Researches on the metabolism of) suffering from acetonemia. 666. 

 Mineral accessory v. Accessory mineral. 

 MiNNAERT (M.) and W. H. Julius. The relation between the widening 



and the mutual influence of dispersion lines in the spectrum of the 



sun's limb. 329. 

 Miocene (Otoliths of teleostei from the oligocene and (he) of the Peel 



district and of Winterswijk. 231. 



