MAGNETIC CHARACTERS OF METALS, &c. 671 
I have aimed at nothing further than an abstract 
of that which absolutely takes place in nature. 
The whole rests upon facts, most of which have 
their analogies in electricity. All bodies are 
known to possess electric properties, but differing 
in degrees of power, and the compounds display 
very different electric powers to those of the 
simple constituents. The electro-magnetic powers 
differ in different bodies, both simple and com- 
pound, as decidedly as the powers which are 
purely electric. Therefore this classification may 
be considered as supplying a small portion of an 
extensive nomenclature that has long been wanting 
in this region of science. . 
may ae y Pe 
58 
