[ 5i ] 
communication, I could fcarcely perceive 
the iigns I looked for; but in proportion 
as the heat diminiihed, they became more 
manifeft. 
Not having a thermometer along with 
me, nor a fuffjcient number of frogs to 
profecute my refearches fo as to purfue and 
determine all thefe gradations, I bethought 
myfelf of an experiment, for which I 
could obtain, as it were, a fixed point; 
this point was that of boiling water. 
When in this ftate, I plunged in it one end 
of my conductor, and with the other 
touched the coating of the nerves of the 
frog, the legs of which communicated 
with a wire, which was likewife in con¬ 
tact with the water, the electricity of 
the animal did not ihew itfelf. 
Some have employed fpirit of wine in- 
Head of water, and becaufe the animal, 
whilft immerfed in this fluid, did not 
move, have concluded that fpirit of 
wine is not a conductor. 
E 2 
Spirit 
