658 EXPERIMENTAL INVESTIGATION, &c. 
petre, borax, sulphate of magnesia, sulphate of 
soda, sulphate of potash, carbonate of potash, and 
carbonate of soda. 
46. Thus far I have attempted to contribute to 
the list of facts previously known, and to correct 
some errors which, probably on account of the 
inefficient modes of investigation, have crept into 
this particular branch of science. It is possible 
also, I think, that some of the facts which have 
now been pointed out, may be an inducement to 
employ the magnet more extensively than hitherto, 
in the laboratory of the chemist. 
