W. Hallock—Smee Battery and Galwanie Polarization. 215 
&xist between the polarization of the same solution between 
platinum and between carbon electrodes, if we consider the 
force was H=0-68 D. at first, but gradually fell off There is 
nO apparent thermo-chemical equivalent for this current and 
the only visible cause for it is the transfer of the hydrogen 
m the more to the less saturated plate. Beetz* has also 
6. Vantuns OF THE ELECTROMOTIVE FORCE OF POLARIZATION. 
The results here obtained are arranged in the tables on the 
following pages 
“88 unit, 4 is calculated from the formula 4= Ray ae =o 9? where 
the letters have the same meaning as in formula (1) and S is 
the surface of the electrode, 800°™". The values of “ P,” the 
Closed, calculated by formula (1); these values are given under 
3 Buns. closed” and “2 Buns. closed,” the primary current 
Uae furnished by two or three Bunsen cells respectively. 
nder “open” are given the values determined after opening 
the Primary current, the length of time elapsing until the read- 
- Beetz, Wied. Be 29, May, 1880. 
t Compare here H. Helmholtz, Ber. Berl., p. 288, 1880; F, A. -igpuagnoei oe 
Mag. V, i, p. 142, 1876; and Helmholtz and’ Root’s, Pogg. Ann., clix, p. 416, ties 
“ unfortunately followed previous examples and kept the paecoheanay itd ed 
circuit con: it is evi : 
results comparable with each other is to keep the density of current on the elec- 
trodes constant, 
