[ 197 1 
Mr. Henley treating in the fame manner 
the Nuremberg glafs, commonly called 
Dutch plates, found that each had a po- 
litive and a negative furface when feparated 
after charging, and when they were re¬ 
placed and a difcharge made, the electri- 
city of both plates was exchanged for the 
contrary electricity. Phil. Tranf. vol. 
% 
Ixvi. An. 1776. 
As under thefe circumftances, the elec¬ 
tricity exits in two oppofite ftates, fo the 
electrical appearances are renewed, and laid 
until the fluid regains its equilibrium. 
This retentive power of electricity (to 
make ufe of the expreffion of Symmer, 
who, as we before obferved, was the 
firffc who difcovered this property, and 
who right fufpected it capable of being 
the caufe of many lingular and curious 
phenomena), is conftant in the mufcles, 
and lafts longer even than the life of the 
animal. The mufcles being conflantly 
O 3 electrifed. 
