Il CONTENTS. 



AstroaOiny. H. J. Zuieus: "Reseaidies on ibe orbit of tlie periodic cornet Holmes and 

 on the perturbations of its elleptic motion". 642. 



— J. C. Kaptevn: "On the parallnx of the nebuhie". 691. 



— W. DE SiïTER: "On the orbital planes of Jupiter's satellites". 767. 



ATOMS (The introduction of halogen) into the benzene core in the reduction of aromatic 



nitro-compounds. 680. 

 AZOBENZENE, Stilbene and Oibenzyl (On Diphenylhydrazine, Hydrazo benzene and 



Benzylaniline, and on the misciliHity of the last two with) in the solid aggregate 



condition. 466. 

 BACTERIA (Methan as carbon-food and source of energy for). 327. 

 BAKHUIS ROD ZE BOOM (h. w.). The ditlcreut branches of the three-pliaselines 



for solid, liquid, vapour in binary systems in which a compound occurs. 455. 



— presents, a paper of Dr. F. M. Jaeger : "On Diphenylhydrazine, Hydrazobenzeno 

 and Benzylaniline, and on the miscibility of the last two with Azobenzene, Stil- 

 bene aud Dibenzyl in the solid aggregate condition". 466. 



— The boiling points of saturated solutions in binary systems in which a compound 

 occurs. 536. 



— presents a paper of Dr. A. Smits : "Ou the hidden e([uilibria in tiie^;, ,r-sections 

 below the eutectic point." 568. 



— presents a paper of Dr. A. Smits : "On the phenomena which occur when the 

 plaitpoint curve meets the three phase line of a dissociating binary compound". 571. 



— presents a paper of J. J. van Laar : "On the course of melting-point curves 

 for compounds which are partially dissociated in the liquid phase, the proportion 

 of the products of dissociation being arbitrary". 699. 



— and J. Olie jr. The solubilities of the isomeric chromic chlorides. 66. 



BAKHUYSEN (h. G. VAN UE S .V N I) E). V. SaNDE BaKHUYSEN (H. Ct. VAN UE). 



BAROMETRIC HEIGHTS (On frequency curves of). 549. 



BENZENE CORE (The introductioii of halogen atoms into the) in the reduction of aromatic 



nitro-compounds. 680. 

 BENZYLANILINE (On Diphenylhydrazine, Hydrazobenzene and); aud on the raiscibility 



of the last two with Azobenzene, Stilbene and Dibenzyl in the solid aggregate 



condition. 466. 

 BESS EL FUNCTIONS (The ([uotient of two successive). I. 547. II. 640. 

 BEIJEEINCK (M. w.) presents a paper of N. L. Söhnoen : "Methan as carbou- 



food and source of energy for bacteria". 327. 

 BINARY COMPOUND (On the phenomena which occur when the plaitpoint curve meets 



the three phase line of a dissociating). 571. 

 BINARY MIXTURE (The molecular rise of the lower critical temperature of a) of normal 



components. 144. 



— (The properties of the sections of the surface of saturation of a) on the side of 

 the components. 280. 



BINARY MIXTURES (On the course of the spinodal and the plaitpoint lines for) of normal 

 substances. S'd communication. 578. 



