NEW PROCESS FOR THE DETECTION OF COPPER. 345 
positive, the platinum negative. The salts of copper have 
the property of being decomposed not only into acid and base, 
but into oxygen and metal. Hence the acid being more 
oxygenated is transferred to the iron or positive pole, while 
the metal is fixed on the platinum or negative pole. 
Such is the process which I offer as most exact, and not 
liable to the uncertainties of the other methods. It is simple, 
does not require any manipulation which may not be per- 
formed by persons with but a slight chemical knowledge, and 
I believe will be found useful in medico-legal experiments. 
Jour, de Pharm. 
VOL VII. — NO. IV. 
14 
