W. Hallockh—Smee Battery and Galvanic Polarization. 281 
apparently simply added itself to the MnCl,, thus forming a 
higher chloride of manganese. 
Adolfo Bartoli* in an interesting research on polarization 
proceeds as follows. A very strong battery (400 zinc-carbon 
ells) is closed a very short time (0-004 sec.) through the vol- 
tameter, and the polarization calculated from the first elonga- 
hon of the galvanometer needle, as a function of the amount of 
transmitted electricity. All the connections were made and 
roken automatically. He finds for the following combinations 
the following maximum values. 
Platinum electrodes an 
H,0 HCL HBr HI 
2°00 D. 1:30 D. 0°94 D. 0°58 D. 
The values calculated from the thermal equivalents are 
1°36 D. 1°57 D. 1°13 D. 0°52 D. 
These values of Bartoli’s agree with those given in Table I, 
but not at all with the calculated ones, so that we cannot calca- 
late the polarization from the thermo-chemical equivalents, 
ven under these circumstances. 
Conclusion. 
The result of this research may be summarized in the four 
following propositions. 1. The generally accepted explanation 
of the variations of the force of the Smee battery, which ascribes 
* Adolfo Bartoli, I1 Nuovo Cim. IIT, vii, p. 234, 1880. 
+ Compare Wied. Galv.. i, p. 681, 1874. 
