IV CONTENTS. 



Chemistry. A. F. Holleman and H. A. Sibks: "The six isomeric dinitrobenzoic acids." 280. 



— A. F. Holleman and J. Huisinga: "On the nitration of phthalic acid and 

 isophthalic acid." 286. 



— R. A. Weerman; "Action of potassium hypochlorite on cinnamide." 803. 



— F. M. Jaeger: "On a substance which possesses numerous different liquid 

 phases of which three at least are stable in regard to the isotropous liquid." 359. 



— H. W. Bakhuis Roozeboom: "The behaviour of the halogens towards each 

 other." 363. 



— N. H. Cohen: "On Lupeol." 466. 



— N. H. Cohen: "On a- and /3-amyrin from bresk." 471. 



— F. M. Jaeger: "On substances which possess more than one stable liquid stat , 

 and on the phenomena observed in anisotropous liquids.'" 472. 



— F. M. JaegeS: "On irreversible phase-transitions in substances which may 

 exhibit more than one liquid condition." 483. 



— A. F. Holleman and G. L. Voerman: "«- and (3-thiophenic acid." 514. 



— A. P. N. Franchimont: "Contribution to the knowledge of the action of absolute 

 nitric acid on heterocyclic compounds." 600. 



— F. A. H. Schreinemakers: "On a tetracoraponent system with two liquid 

 phases." 607. 



— J. Boeseken: "On catalytic reactions connected with the transformation of yellow 

 phosphorus into the red modification." 613. 



— F. M. Jaeger: "On the anisotropous liquid phases of the butyric ester of 

 dihydrocholesterol, and on the question as to the necessary presence of an ethylene 

 double bond for the occurrence of these phenomena." 701. 



— P. van Romburgh and A. D. Maurenbrkcher: "On the action of bases, 

 ammonia and amines on s.trinitrophenyl-methylnitramine." 704. 



CHLORAL.VLCOHOLATE (Three-phaselines in) and auilinehydrochloride. 99. 



cholesterol (On the fatty esters of) and Phytosterol, and on the anisotropous liquid 

 phases of the cholesterol-derivatives. 78. 



cinnamide (Action of potassium hypochlorite on). 303. 



clay (j.) and H. Kamerlingh Onnes. On the measurement of very low tempera- 

 tures. X. Coefficient of expansion of Jena glass and of platinum between + 16° 

 an( j — 182°. 199. XL A comparison of the platinum resistance thermometer 

 with the hydrogen thermometer. 207. XII. Comparison of the platinum 

 resistance thermometer with the gold resistance thermometer. 213. 



cohen ( n. h.). On Lupeol. 466. 



— On «-and (3-amyrin from bresk. 471. 



comet holmes (Researches on the orbit of the periodic) and on the perturbations o 



its elliptic motion. IV. 414 . 

 common points (On the locus of the pairs of) and the envelope of the common chords 



of the curves of three pencils. 1st part. 421. 2nd pirfc. Application to pencils of 



conies. 548. 



— (The locus of the pairs of) of four pencils of surfaces. 55 5. 



