This British scientist proved that diamonds were composed only of carbon. He is  also credited with 
This British scientist proved that diamonds were composed only of carbon. He is  also credited with disproving Lavoisier's theory that oxygen causes acidity. He is  more famous for using the newly developed principles of electrochemistry to isolate  alkaline and alkali earth metals. FTP, name this chemist who lends his name to a  lamp used by miners.
This British scientist proved that diamonds were composed only of carbon.