VIII CONTENTS. 



GALVANOMETER (Analysis of the curves obtained with the string). Mass and tension 

 of the quartz wire and resistance to the motion of the string. 210. 



GAS (Improvement to the open mercury manometer of reduced height willi transference 

 of pressure by means of compressed). 75. 



— (Improvement in the transference of pressure by compressed) especially for tlie 

 determination of isothermals. 76. 



GASEOUS BODIES (The absorption and emission lines of). 591. 



GASES (The purifying of) by cooling combined with compression especially the preparing 



of pure hydrogen. 82. 

 GASPHASE (Contribution to the knowledge of the px- and the pTVmes, for the case 



that two substances enter into a combination which is dissociated in the liquid 



and the). 200. 

 GASTHEORIE (Some remarks on the quantity iZiu Boltzmann's Vorlesungen fiber). 630. 

 Geology. H. G. Jonker: "Some observations on the geological structure and origin 



of the Hondsrug". 96. 



— EuG. Dubois : "The geographical and geological signification of the Hondsrug, 

 and the examination of the erratics in the Northern Diluvium of Holland". 427. 



— C. E. A. Wichmann : "On fragments of rocks from the Ardennes found in the 

 diluvium of the Netherlands North of the Rhine". 518. 



— K. Martin: "On brackish and fresh water deposits of the river Silat in Western- 

 Borneo." 742. 



GLYCOLS and glycerol (On the action of ammonia and amines on formic esters of). 3.':i9. 

 growth of stems and flower-stalks (Some observations on the longitudinal). 8. 

 gutta-percha (On the presence of lupeol in some kinds of). 137. 



— The occurrence of ^-amyrine acetate in some varieties of). 544. 



hag A (h.) presents a paper of Dr. C. Schoute : "Determination of the Tliomson-ellect 



in mercury". 331 . 

 hamburger (h. J.). A method for determiniug the osmotic pressure of very small 



quantities of liquid. 394. 

 heat (On the radiation of) in a system of bodies having a uniform temperature. 401 . 



— (Measurement of the) produced by the integral radiation of the corona and of 

 the solar disk. 503. 



— in crystals (A simple geometrical deduction of the relations existing between 

 known and unknown quantities, inentioned in the method of Voigt for deter- 

 mining the conductibility of). 793. 



UEXAÏRIENE (On the simplest hydrocarbon with two conjugated systems of double bonds, 



1, 3, 5). 565. 

 hickson (SYDNEY J.). On a new species of Corallium from Timor. 268. 

 n o E K (p. p. c). On the polyandry of Scalpellum Stearnsi. 659. 

 IIOLLEMAN (a. f.) presents a paper of Dr. J. J. Blanksma: "Nitration of symmetric 



nilrometaxylene." 70. 



— presents a paper of Dr. F. M. Jaeger and Dr. J. J. Blanksma : "On the six 

 isomeric tribromoxylenes." 153. 



