"^ni CONTENTS. 



CURVES (Tlie hcu-moiiic) belonging to a given plane cubic curve. 197. 



— (Rectifying). 208. 

 CVCLOHEXANOL (rreparaliou of). 201. 

 DAILY FIELD (The) of magnetic disturbance. 313. 

 DANiELL-CELLS (The electromotive force of the). 4. 

 DECOMPOS ABILITY (Algebraic deduction of the) of tiie continuous motion aboutaiixed 



point of S^ into those of two S^s. 832. 

 DEKHUYZEX (m. c.) and P. Vermaat. On the epithelium of the surface of the 



stomach. 30. 

 D ELD EN (A. VAN) and M. W. Eeijerinck. On the bacteria which are active in 



flax-rotting. 462. 

 DIBENZAL- and benzalmethylglucosides. 452. 



DIFFERENTIAL EQUATION (On the) of MoNGE. 620. 



DIKETONES 1,2 (Action of hydrogenperoxyde on) and on «-ketonic acids. 715. 

 DILUVIUM (A piece of lime-stone of the Ceratopygo-zone from the Dutch). 319. 

 DiPHENYLNiTROSAMiNE (The transformation of) into /^-nitroso-diphenylaniine and its 



velocity. 267. 

 DISPERSION (The) of the blondine and brunette type in our country. 846. 



— of light (The periodicity of solar phenomena and the corresponding periodici/y 

 in the variations of meteorological and earth-magnetic elements, explained by 

 the). 270. 



DITO (j. w.). The action of phosphorus on hydrazine. 1. 



DORP (w. A. van) and S. Hoogewerff. On the compounds of unsaturated ketones 



with acids. 325. 

 D u B o I .s (e u G.). Deep boulder-clay beds of a latter glacial period in North-Holland. 340. 



— Facts leading to trace out the motion and the origin of the underground water 

 in our sea-provinces. 738. 



D IJ K (G. V A N) and J. KuNST. A determination of the electrochemical equivalent of 

 silver. 441. 



EAUTH-MAGNETiCAL elements (The periodicity of solar phenomena and the corres- 

 ponding periodicity in the variations of meteorological and), explained by the 

 dispersion of light. 370. 



Effect (A new law concerning . the relation between stimulus and) ((j*ii communi- 

 cation). 73. 



ÊINTHOVEN (w.). The string-galvanometer and the human electrocardiogram. 107. 



— On some ai^plications of the string-galvanometer. 707. 



EKEN STEIN (W. ALBERDA VAN). See AlBERDA VAN EkENSTEIN (W.). 



ELECTROCARDIOGRAM (The string-galvanometer and the human). 107. 

 ELECTROCHEMICAL equivalent of silver (A determination of the). 441. 

 ELECTROLYSIS (Do the lous Carry the solvent with them in). 97. 



ELECTROMAGNETIC phenomena in a system moving with any velocity smaller than that 

 of light. 809. 



ELECTROMOTIVE-FORCE (The) of the ÜANlELL-cells. 4. 

 EMÜI.SIN (On the action of). 332. 



