on a Permanent Electric Current. 173 
ject of gold leaf strips with a very few words, were it not the 
case that, in a matter of this kind, it seems proper that the pub- 
lic should be informed of anv facts that have the slightest 
suspicious appearance. 
The gold plates which are now to be described, were of 
comparatively thick metal, sueh as is used by dentists. The 
same number. 
Gold Foil, No. 6 (A). 
his strip was, I believe, of the kind called by dentists 
“hard,” or “cohesive.” To determine the thickness it was 
S. 
oe was in general shape a parallelogram with a pro- 
jection from the middle of eath of its longer sides. The use 
of these projections, which were much reduced in size before 
making the observations, has been already explained. 
ip tg of strip when weighed = 8°50 cm. 
Width a 3 ee Qeh a st 
Area including projections = 2080 * ag. 
Weight = .0848 grms. 
Taking the specific gravity of gold at 19°36, the value given 
by Ganot for “gold stamped,” we find 
Thickness = ‘000214 em. 
With this pes many series of experiments were made, yield- 
he time results which were very discordant, owing 
to various disturbing causes, some known and others perhaps 
