VIII CONTENTS. 



holle man (a . f) presents a paper of Dr. J. J. Blanksma : "Nitration of meta- 

 substituted phenols." 278. 



— presents a paper of Dr. J. Boëseken : "On catalytic reactions connected with 

 the transformation of yellow phosphorus into the red modification". (513. ' 



— and J. Huisinga. On the nitration of phthalic acid and isophthalic acid. 286. 



— and H. A. Sirks. The six isomeric dinitrobenzoic acids. 280. 



— and G. L. Voerman, «-and (3- thiophenic acid. 514. 



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



its elliptic motion. IV. 414. 

 hoogewerff (s.) presents a paper of R. A. Weerman: "Action of potassium 



hypochlorite on cinnamide." 303. 

 hu br echt (a. a. w.) presents a paper of Dr. F. Muller : "On the placentation 



of Sciurus vulgaris." 380. 



— presents a paper of Dr. J. Boekf, : "Gastrulation and the covering of the yolk 

 in the teleostean e°:g". 800. 



— On the formation of red blood-corpuscles in the placenta of the flying maki 

 (Galeopithecus). 873. 



huisinga (j.) and A. F. Hollkman : "On the nitration of phthalic acid and iso- 

 phthalic acid." 286. 



hydrogen (How to obtain baths of constant and uniform temperature by means of 

 liquid). 15»). 



— (The purification of) for the cycle. 171. 



(Preparation of pure) through distillation of less pure hydrogen. 179. 



— (Isotherms of) between — 104° C. and — 217° C. 7&4. 

 ICE (On the motion of a metal wire through a piece of). 718. 



integers (Some formulae concerning the) less than n and prime to n. 408. 



ions (On the introduction of the conception of the solubility of metal) with electro- 

 motive equilibrium. 2. 



irradiation (On the influence which) exerts on the electrical conductivity of Anti- 

 in onite from Japan. 809. 



isotherm (The shape of 'lie empiric) for the condensation of a binary mixture. 750. 



isotherms of diatomic gases and their binary mixtures. VI. Isotherms of hydrogen 

 between — 104° O. and — 217° O. 754. 



ISOTROPOUS liquid (On a substance which possesses numerous ditlerent liquid phases 

 of which three at least are stable in regard to the). 359. 



jaeger (f. m.). On the crystal-forms of the 2.4 Dinitroaniline-derivatives, sub- 

 stituted in the NH 2 -group. 23. 

 On a new case of form-analogy and miscibility of position-isomeric benzene- 

 derivatives, and on the crystalforms of the six nitrodibromobenzenes. 26. 



— On the fatty esters of Cholesterol and Phytosterol, and on the anisotropoua 

 liquid phases of the Cholesterol-derivatives. 78. 



— Researches on the thermic and electric conductivity power of crystallised 

 conductors. I. 89. 



