Ir CONTENTS. 
(Portuguese West-Africa)” (communicated by Dr. E. F. VAN DE SANDE Bak 
HUYZEN). 398. 
Astronomy. J. Wreper: /The 11-monthly period of the motion of the pole of the 
earth from determinations of the azimuth of the meridian marks of the Leiden 
Observatory from 1882—)$96” (communicated by Prof. H. G. VAN DE SANDE 
Bakunvyzen). 546. 
ASYMMETRICAL CHANGE (Some observations concerning an) of the spectral lines of 
iron, radiating in a magnetic field. 298. 
azimutu (The 14-monthly period of the motion of the pole of the earth from deter- 
minations of the) of the meridian marks of the Leiden Observatory from 1882 
—1896. 546. 
Bacteriology. M. W. Beryertnck: »On Indigo-fermentation,” 495. 
BAKHUIS ROOZEBOOM (H. W.). An example of the conversion of mixed crystals 
into a compound. 23. 74. 
— presents a paper of Dr. Exnst Conen and C. van Erk: „On the Enantictropy 
of Tin.” 23. 77. TI. 81. 149. IIT. 281. IV. 464. 
— Mixed crystals of mercuric iodide and bromide. 81. 146. 
— presents a paper of Dr. Ernst Couen: On a new kind of Transition elements 
(sixth kindj.” 81. 153. 
— presents the dissertation of Dr. H. J. Hisstxk: >On mixed crystals of sodium 
nitrate with potassium nitrate and of sodium nitrate with silver nitrate.” 158. 
— The nature of inactive Carvoxime. !60. 
— presents a paper of Dr. Erxsr Conen: >The alleged identity of red and yellow 
mercuric oxide.” [. 273. LI. 407. 458. 
— presents a paper of Dr. Ernst Coen: „On the theory of the Transition Cell 
of the third kind.” (Part 1). 334. 
— presents a paper of Dr. A. Smits: „Determination of the decrease in the vapour 
tension of solutions by means of determination of the increase in the boiling 
point”. 407. 469. 
— presents a paper ef Dr. C. van Eisk: „Formation and transformation of the 
double salt of Silvernitrate and Thalliumnitrate”. 468. 480. 
— presents a paper of Dr. Exnst Conen: „Thermodynamics of Standard cells.” 
(ist Part). 610. 
— presents a paper of Dr. Ernst Conen: „Studies on Inversion.” (1st Part). 618. 
— presents a paper of Dr. A. Smits: /Determinations of the diminution of vapour- 
pressure and of the elevation of the boiling-point of dilute solutions.” 635. 
BAKIUIJZEN (E. F. VAN DE SANDE). See SANDE BAKHUIJZEN (EK. I. van DE). 
BAKHUIJZEN (H. G. VAN DE SANDE). See SANDE Baknuwzen (H. G. van pe). 
BAKKER (G.). A remark on the molecular potentialfunction of Prof. van DER 
Waats. 163. 
— The potentialfunction 2 (7) = 
Acv a Beat and ¢ (7) = A sin (gr + 2) 
3 = 
and the potential function of vaN DER Waars. 247. 
BATAVIA (On spasms in the terrestrial magnetic force at). 141. 202. 
— (Two earth-quakes registered in Europe and at). 244, 
