XVIU CONTENTS 



SuPERTENSioN (The phenomenon of electrical). III. 259. 



SuPRA-coNDUCTORS (Transients of magnetic field in). 529. 



SwEMLE (I.) and L. Rutten. New findings of pliocene and pleistocene 



mammals in Noord Brabant, and their geological significance. 199. 

 Synthesis (The) of some pyridylpyrroles. 426. 

 S zent-G YÖR G Y I (A. V.) and R. Brinkman. Researches on the chemical 



causes of normal and pathological haemolysis. 470. 

 Tangents (A representation of the line elements of a plane on the) of a 



hyperboloid. 129. 



Tauber"s theorem (On a generalisation of) corcerning power series. 216. 

 Telegraphy, wireless (The string galvanometer in). 635. 

 Teleostei (Otoliths of) from the oligocene and the miocene of the Peel- 

 district and of Winterswijk. 231. 



Terrains TERTIAIRES (Description de crustacés décapodes nouveau.x des) de 

 Borneo. 489. 



— (Description de Raniniens nouveaux des) de Borneo. 777. 

 Tertiary marine deposits (On) with fossil fishes from South Celebes. 159. 

 Testis (Secondary sex-characters and) of the ten-spined stickleback (Gaster- 



osteus pungitius L.). 309. 



Tetrahedral complex (Representation of a) on the points of space. 390. 

 Theorem (A generalisation of Mertens). 203. 



— On a generalisation of Tauber's) concerning power series. 216. 

 Thymus, spiracular sense organ and fenestra vestibuli (ovalis) in a 63 m.m. 



long embryo of Heptanchus cinereus. 727. 



Tollenaar (D.). Dark growth-responses. 378. 



Turbulent motion (On the resistance experienced by a fluid in). 582. 



Tuyn (VV.) and H. Kamerlingh Onnes. Further experiments with liquid 

 helium. S. On the electric resistance of pure metals, etc. XII. Measure- 

 ments concerning the electric resistance of indium in the temperature 

 field of liquid helium. 504. 



Twisted cubics (A congruence (1,0) of). 126. 



Urk (A. Th. van), J. P. KuENEN and T. Verschoyle. Isotherms of di-atomic 

 substances and their binary mixtures. XX. The critical curve of oxygen- 

 nitrogen mixtures, the critical phenomena and some isotherms of two 

 mixtures with 50 % and 75 "/[, by volume of oxygen in the neighbour- 

 hood of the critical point. 49. 



Vagi (On the influence of the) on the frenquency of the action currents of 

 the diaphragm during its respiratory movements. 771. 



Valeton (Th.). The genus Coptosapelta Korth. (Rubiaceaei. 361. 



