on eleftrical Inftrument . 407 
ever any other electricity the plates may poffefs. I fcarcely 
need obferve, that if this difficulty ffiould hereafter be removed, 
the inftrument will have great advantages as a multiplier of 
eleCtricity in the facility of its ufe, the very fpeedy manner of 
its operation, and the unequivocal nature of its refults. 
I have the honour to be, &c. 
W. NICHOLSON. 
