A metal discovered by Sir H. Davy, in the earth barytes, in which it is combined with oxygen, thus constituting a metallic oxide. The following is the mode of obtaining it: take pure barytes, make it into a paste with water, and place it on a plate of platina. Form a cavity in the middle of the barytes, and in it drop a globule of mercury. Touch the globule with the negative wire, and the platina with the positive wire, of a voltaic battery of about 100 pairs of plates in good action. In a short time, an amalgam will be formed consisting of mercury and barium. This amalgam must be introduced into a bent glass tube, filled with the vapour of naphtha, and the end must then be hermetically sealed; heat being applied to the received end in which the amalgam lies, the mercury will distil over, leaving the barium, which is of a dark grey colour, and of a lustre inferior to cast iron. Dr. Clarke asserts, that he obtained metal by exposing pure barytes to the flame of the oxy-hydrogen blow-pipe, but no one has since succeeded in the experiment, and it is generally believed that the Doctor was mistaken, and that the globules which he formed, owed their lustre and polish to the fusion the earth had undergone.