speiss

An arsenic compound or a mixture of arsenic compounds resulting from the smelting of iron, cobalt, nickel, and copper ores.

A compound, consisting chiefly of arsenic and iron, but often containing nickel and cobalt, obtained in smelting the complicated lead ores occurriug near Freiberg in Saxony, and in other localities.

A regulus consisting essentially of nickel, obtained as a residue in fusing cobalt and nickel ores with silica and sodium carbonate to make smalt.

Impure metallic arsenides, principally of iron, produced in copper and lead smelting.

A mixed arsenide of iron (and cobalt, nickel, and copper) produced during the smelting of lead