VI. — Oji a new and practical Voltaic Battery 

 of the highest powers, in which Potassium 

 forms the positive element. By John Good- 

 man, Esq. 



(Read, October 20, 1846.) 



Potassium is well known in science as one of 

 the most powerful chemical substances — posses- 

 sing chemical affinities and powers of the highest 

 order. 



This substance appears to have been long 

 known also in an electrical point of view, for we 

 find it arranged by Sir H. Davy and others, at 

 the head of a list of positive and negative metals 

 in which it forms the principal oxidizable metal, 

 being, with its amalgams, electro positive to all 

 other metals arranged in electrical relations with 

 it. 



M m 



