Nickel, a semi-metal, the use of which has hitherto been very limited. It is rarely found, and almost exclusively in cobalt-mines.. The regulus of nickel is in the ore mineralized with sulphur, and mix-ed with iron, cobalt, and arsenic : when dissolved in acids, it affords green crystals : by means of the fixed vegetable alkali, it produces yellow ; yellow ; and by the volatile alkali, blue solutions.

This semi-metal can with great difficulty be fused with other metals. We understand, however, from a foreign writer, that the Chinese, by the addition of nickel, prepare their white copper, which is an elegant composition, and may be applied in the arts, to many useful purposes.