[ us 3 
when it once finds a paflage open, purfue^ 
it, although under fomewhat unfavourable 
circumftances. Now in order to judge of 
the influence which the author accords to 
electricity of metals, it is of confequence 
to lay before my readers the following 
experiments. 
Experiment CXXIL 
Having prepared ten frogs, I placecj 
them in a circle, in contact with each 
other, haying laid their nerves upon a 
circular piece of tin, which ferved as a 
common coating. I then made a commu¬ 
nication by a narrow fhred of tin a third 
of an inch in length, between a frog and 
the metal plate, and they were all flrongly 
convulfed at the fame moment. 
In this experiment, I cannot conceive 
how the circulation could take place and 
continue between two metals, which 
touched each other; and if it did take 
place, 
