268 W. Hallock—Smee Battery and Galvanic Polarization. 
through which the latter are united to form the great family 
Spheeroidocrinidee. 
ArT. XXIX.—On the Smee Battery and Galvanic Polarization ; 
by Wm. HaLuock.* 
1. INTRODUCTION. 
THE electromotive force of the Smee battery, when deter- 
mined with the greatest care by different methods, gives values 
which differ greatly from each other and are larger or smaller 
than the theoretically calculated value, E = 0°75 D.,+ according 
as the resistance in the circuit used is larger or smaller than 
about 300 or 400 S. E.t It was with a view to obtaining an 
which might help to decide between various conflicting eX: 
panebone already offered, especially those of Exner} and 
to collect as large a number of values as possible, to see 
what extent the experimentally determined values correspond 
with the theoretically calculated ones. 
2. APPARATUS. 
Not having at my disposal an electrometer which answered 
all the requirements of delicacy, damping, ete., it was deter- 
; 
The small ring magnet had a short time of vibration 
(1-1 second) and was so strongly damped that it came to rest 
* Being an abbreviated translation by the author, the original having appeared 
in Wiedemann’s Annalen, vol. xvi, p. 56, 1882. 
+ As this work originally appeared in Germany the Daniell (D.) and Siemens 
Unit (S. E.) were used. 
F. Exner, Wien. Ber., lxxx, 1879, und Wied. Ann., x, p. 265, 1880. 
§ C. Fromme, Sep.-Abdr. a. d. 20, Ber. d. Oberh. Ges. f. Natur- u. Heilkunde. — 
Wied. Ann., xii, p. 399, 1881. 
