A piece of 1 1/2-in. brass tube may be bent in the following manner. First carefully anneal the tube, and when it is cold, tie brown paper over one end, and insert this end in sand. Now melt enough lead to fill the tube, and pour it into the tube from a plumber's ladle. In a firmly fixed bench cut a hole a little larger than the tube, and chamfer the sharp edge round the hole. Remove the paper at the end of the tube, and pass the latter through the hole in the bench to the desired position of the bend. Pull the top end of the tube over against the rounded shoulder at the top of the hole: pass the tube a little farther through the hole and again bend, and repeat until the desired curve is obtained. Bruises in the throat of the bend may be worked out with a round-faced hammer; then re-heat the tube until the lead flows out and leaves the interior clear.