CONTENTS. Vv 
Uhemistry. J. M. vaN BemMe ten: “On the composition of the silicates in the soil which 
have been formed from the disintegration of the minerals in the rocks”. 329. 
— A. F. HorLEMAN: “On the preparation of pure o-toluidine and a method for 
ascertaining its purity”. 395. 
— J. J. BLANKsMA: “On trinitroveratrol”’. 462. 
— 8. Tymsrra Bz.: “On W. Marckwa.p’s asymmetrie synthesis of optically active 
valerie acid”, 465. 
— A. H. W. Aven: “On the system pyridine and methyliodide”. 468. 
— J. BöeseKEN: “The reaction of FrIEDeL and Crarrs’”’, 470, 
— J. J. van Laar: “On some phenomena, which can occur in the case of partial 
miscibility of two liquids, one of them being anomalous, specially water”. 517. 
— H. W. Baknuis RoozeBoom and E‚ H. Bicuner: “Critical terminating points 
in three-phase lines with solid phases in binary systems which present two 
liquid layers”. 556. 
— J. J. van Laar: “On the different forms and transformations of the boundary- 
curves in the case of partial miscibility of two liquids”, 636. 
— J. J. van Laar: “An exact expression for the course of the spinodal curves 
and of their plaitpoints for all temperatures, in the case of mixtures of normal 
substances”. 646. 
— F. M. Jarerr: “On miscibility in the solid aggregate condition and isomorphy 
with carbon compounds”, 658. 
— F. M. JarGer: “On orthonitrobenzyltoluidine”. (66. 
— F, M. Jararr: “On position-isomerie Dichloronitrobenzenes”. 668. 
— A. W. Visser: “A few observations on autocatalysis and the transformation of 
y-hydroxy-acids, with and without addition of other acids, conceived as an ion= 
reaction”. 760. 
CLIMATE (Oscillations of the solar activity and the). 368. 
COMPLEX (On a special tetraedal). 572, 
COMPLEXES (On a group of) with rational cones of the complex. 577. 
— of rays (A group of algebraic). 627. 
COMPONENTS (Double refraction near the components of absorption lines magnetically 
split into several). 485. 
CONDITIONS of coexistence (The) of binary mixtures of normal substances according 
to the law of corresponding states. 222, 
— (The determination of the) of vapour and liquid phases of mixtures of gases at 
low temperatures. 233. 
CONGRUENCE (a) of order two and class two formed by conics. 311. 
conics (The congruence of the) situated on the cubic surfaces of a pencil. 264, 
— (A congruence of order two and class two formed by). 311. 
CORRIGENDA et addenda, 382. 
CRAFTS (The reaction of FrrepeL and). 470. 
CRITICAL PHENOMENA (The influence of admixtures on the) of simple substances and 
the explanation of TrtcHNER’s experiments. 474, 
CROMER FOREST-BED (On an equivalent of the) in the Netherlands, 214, 
