BLACK VARNISH FOR IRON.
Genuine asphaltum (not coal tar imitation), 1 pound; lamp black, ¼ pound; rosin, ½ pound; spirits turpentine, 1 quart. Dissolve the asphaltum and rosin in the turpentine, then rub up the lamp black with linseed oil, only sufficient to form a paste, and mix with the others.