CONTENTS. Ill 



Botany. S. H. Koorders: "Contribution no. 1 to tlie knowledge of the Flora of Java". 



674. Continuation. 762. 



— F. A. F. C. Went: "The development of the ovule, embryo-sac and egg in 



Podostemaceae". 824. 

 B o u M A N (z. p.). Contribution to the knowledge of the surfaces with constant mean 



curvature. 545. 

 BRAAK (c), J. Clay and H. Kamerlingh Onnes. On the measurement of very low 



temperatures. XVII. Determinations for testing purposes with the hydrogen 



thermometer and the resistance thermometer. 422. 

 BRAAK (c.) and H. Kamerlingh Onnes. Isotherms of diatomic gases and their 



binary mixtures. VI. Isotherms of hydrogen between — 104° C. and — 217°C. 204. 



Continued. .413. VII. Isotherms of hydrogen between 0° C. and 100° C. 419. 



— On the measurement of very low temperatures. XVIII. The determination of the 

 absolute zero according to the hydrogen thermometer of constant volume and the 

 reiuction of the readings on the normal hydrogen thermometer to the absolute 

 scale. 429. XX. Influence of the deviations from the law of Boyle-Charles on the 

 temperature measured on the scale of the gas-therraometer of constant volume 

 according to observations with this apparatus. 743. 



BRAIN (On the development of the Corpus Callosum in the human). 344. 



branchiostoma lanceolatum (On the structure of the nerve cells in the central 

 nervous system of). 1st Communication. 86. 



BRAUNS (d. h.). On a crystallised d. fructosetetracetate. 563. 



brick-earth of ïegelen (On Dulichium vespiforme sp. nov. from the). 860. 



BÜD3 (On the influence of wound stimuli on the formation of adventitious) in the 

 leaves of Gnetum Gnemon L. 168. 



calibration of some platinum-resistance thermometers. 200. 



Cardinaal (j.). Some constructions deduced from the motion of a plane system. 648. 



cartilaginous vertebrae (On the existence of) in the development of the skull of 

 birds. 14. 



CATS (On the segmental skin-innervation by the syinpathetic nervous system in verte- 

 brates, based on experimental researches about the innervation of the pigment 

 cells in flat fishes and of the pilo- motor muscles in). 332. 



cells (On five pairs of four-dimensional) derived from one and the same source. 499. 



Chemistry. .1. J. van Laar : "On the course of the plaitpoint line and of the spinodal 

 lines, also for the case, that the mutual attraction of the molecules of one of the 

 components of a binary mixture of normal substances is slight". 34. 



— P. VAN RoMBURGH: "The decomposition of penta - erythritoltetraformate on 

 heating". 166. 



— P. VAN EoMBURGH: "On lupeol''. 292. 



• — R, A. Weerman: "Action of potassium hypochlorite on cinnamide." (2^'^ Com- 

 munication). 308. 



— F. M. Jaeger: "On the question as to the miscibility and the form-analogy 

 in aromatic nitro- and nitroso-compounds". 436. 



— J. J. Blanksma: "On the constitution of Van Geuns' oxymethyldinitrobenzo- 

 nitrile". 509. 



