CONTENTS XI 



Languagk (Contributions to an experimental phonetic investigation of the 



Dutch). I. The short o. 745. 

 Latumeten (J. A.) and E. Winkler-Junius. The histopathology of Lyssa 



in respect to the propagation of the lyssavirus. 825. 

 Lava (On the occurrence of diamond as an accessory mineral in olivine 



and anorthite bearing bombs, occurring in basaltic), ejected by the 



volcano Gunung Ruang (Sangir-Archipelago north of Celebes). 510. 

 LiFSCHiTZ (J.). Volta-luminescence. 561. 

 Light o.xidation (The) of alcohol. IIL The photocatalytic influence of some 



series of ketones on the light oxidation of ethyl alcohol. 443. 

 Limiting sets (Inner). 189. 

 Line elements (A representation of the) of a plane on the tangents of a 



hyperboloid. 129. 

 Lipoids (The splitting of) by bacteria. I. 436. 

 Liquids (On the diffraction of Röntgen-rays in). II. 112. 

 Lyssa (The histopathology of) in respect to the propagation of the lyssavirus. 



825. 

 Magnesium (The electromotive behaviour of). II. 395. 

 Magnetic field (Transients of) in supra-conductors. 529. 

 Magnetic researches. XXII. On the determination of the magnetisation at 



very low temperatures and on the susceptibility of gadolinium sulphate 



in the region of temperatures obtainable with liquid hydrogen. 613. 



— XXIII. On the magnetisation of gadolinium sulphate at temperatures 

 obtainable with liquid helium. 626. 



— XXVI. Measurements of magnetic permeabilities of chromium chloride 

 and gadolinium sulphate at the boiling point of liquid hydrogen in 

 alternating fields of frequency 369.000 per second. 840. 



Magnitude equation (On the) of Osthoff's estimates of star-colours. 12. 

 Mammals (The ontogenetic development of the corpus striatum in birds 

 and a comparison with) and man. 135. 



— (New findings of pliocene and pleistocene) in Noord Brabant, and 

 their geological significance. 199. 



Mathematics. B. L. van der Waerden : "Ueber das Komitantensystem 

 zweier und dreier ternarer quadratischer Formen". 2. 



— Jan de Vries: "A null system (1, 2, 3)". 124. 



— Jan de Vries : "A congruence (1,0) of twisted cubics". 126. 



— Jan de Vries: "A representation of the line elements of a plane on 

 the tangents of a hyperboloid." 129. 



— J. Wolff: "On the points of continuity of functions". 187. 



— J. Wolff: "Inner limiting sets." 189. 



— M. J. Belinfante: "A generalisation of Mertens' theorem". 203. 



