Metallic Arsenic. As.

Prepared by mixing Arsenious Anhydride with charcoal and decomposing it at a dull red heat; the oxygen unites with the carbon, and the Metallic Arsenic passes off in vapour and is deposited in crystals on the cool part of the apparatus employed, which, when a small quantity only is required, may conveniently consist of a glass tube.

Characters and Tests. - A very pale steel-grey metal, of brilliant lustre, crystallizing when sublimed in rhombic octo-hedrons. The odour of its vapour is powerful, and strongly resembles that of Garlic. In a closed vessel it may be sublimed again and again without change.

Reference to Horn. Proving. - North Amer. Horn. Journ., vol. i.

Preparation. - Trituration.