[ 52 ] 
Spirit of wine, however, conducts, but not 
as well as water. To afcertain this property, 
the animal fhould not be expofed to the ac¬ 
tion of the fpirit during its examination. 
Heat increafes the conducting power of 
fpirit of wine as well as of water, but this 
it does only in a certain degree. Excefs 
of heat deftroys it altogether. 
I have made the fame obfervation with 
regard to cold. When water has been at 
the freezing point, it has never afforded 
paffage to the electricity of my frogs. 
Thofe who are acquainted with the origi¬ 
nal and beautiful experiment of the cele¬ 
brated Achart, will not be aftonifhed at 
this circumftance. 
Knowing that heat changes non-con- 
duCting into conducting fubfiances, I tried 
it upon glafs and fealing-wax, and in both 
it fucceeded. To produce this effeCt, 
there is a neceffity for two coatings one 
is patTed under the thighs, and the other 
round the nerves. An interval fhould be left 
between 
