YI CONTENT S. 



EQUATIONS (Reduction of observation) contiiinin^ more than one measured quantity. 236. 



n'he fundamental) for electroniaguetic- phenomena in jjonderable bodies, deduced 



from the theory of electrons. 254. 

 EQUILIBRIA of phases in the system : acelaldehyde + paraldehyde with and without 



raolecular transformation. 283. 

 EKRATIC-BLOCKS (Cambrian) at liemeUiin in the Soutii-West of VvWnu 140, 

 (Some new under-canibrian) from the Dutch diluvium. 5ül. 



— (Two new mid cambrian) from the Dulch diluvium. 652. 



ERRATUM. 217. 



ESTERS (On the so-called compounds of salts ofsulphoucarboxylic acids with sulphuric). 482. 



ETHANE and Methylalcohol (Critical phenomena of partially miscible licpiids). 473. 



Ethnology. A. W. Nieuwenhuis : "Influence of champed conditions of life on the 

 physical and psychical development of the population of Central-Borneo."' 525. 



FORMALDEHYDE (Methylene-) derivatives of sugars and ijclucosides. 175. 



FRANCHIMONT (A. P. N.). On the so-called compounds of salts of sulphoucarboxylic 

 acids with sulphuric esters. 48?. 



ERAUNHOFER-LINES (Peculiarities and chtinges of) inter^jreted as anomalous dispersion 

 of sunlight in the corona. 589. 



GALVANIC CELLS and the phase rule. 182. 



(JANGLIONCELLS (On the structure of the light percepting cells in the spinal cord, on 

 the ueurotibrillae in the) and on the innervation of the striped muscles in Am- 

 phioxus lauceolatus. 350. 



GASES (Isotherms of diatomic) and their binary mixtures. V. An accurate volumeno- 

 meter and mixing apparatus, ü36. 



— (Measurements on the magnetic rotation of tiie plane of polarisation in liquelied) 

 under atmospheric pressure. 243. 



Geology. Kug. Dubois-. "The geological structure of tlie liondsrug in Drenthe and tlie 

 origin of that ridge". (I). 93. (11). 101. 



— J. H. Bonnema: "Cambrian erratic-blocks at llemelum in the South-West of 



Frisia", 140. 

 J ]j_ Bonnema: "Some new under-cambrian erratic-blocks from the Dutch dilu- 

 vium". 561. 

 j_ H. Bonnema: "Two new mid-cambrian erratic-blocks from the Dutch dilu- 

 vium", 652. 

 GEOMETRICAL representation (On the) of the motion of variable systems. 386. 

 GLUCOSIDES (Formaldehyde 0»ethyleue)- derivatives of sugars and). 175, 



— (Investigations of) in connection with the internal mutation of i)hints. 2ÏJ5. 

 HAG A (H,) and C. H. Wind. Dillraction of Kijutgen-rays 247. 



HALLO (j, J.). The value of some magneto-optic constants. 438. 

 HALOGENJVCETANILIDES (The intramolecular rearrangement in) and its velocity. (I). 178. 



(II). 359. 

 HEART (On the duration of the compensatory pause after stimulation of the auricle of 



the mammalian). 378. 

 HEMELDM (Cambrian erratic-blocks at) in the South-West of Frisia. 140. 



