PITCH

PITCH. See Encycl.—The best black pitch is made of the refuse of rosin and turpentine, such as will not pass through the straw filter, and the cuttings around the incision on the tree. These materials are

put into a boiler six or seven feet in circumference, and eight or ten high. Fuel is laid around the top, and the materials as they melt flow through a channel cut in the fire-place into a tub half filled with water. It is at that time very red, and almost liquid. To give this a proper consistency, it is put in a cauldron placed in a furnace, and boiled down in the same manner as rosin, but it requires much less precaution and double the time. It is then poured into moulds of earth, and forms the best kind of black pitch. See ROBIN and TURPENTINE in this Suppl.