. The art of lead burning; a practical treatise explaining the apparatus and processes. ect the hose tothe gasoline can, open the cocks and the appa-ratus is ready for use. Air Holder No. 2. To make the air holder shown in Fig. 11, takea sheet of No. 26 gauge galvanized iron 30 incheswide. Make it into a cylinder 26 inches in diam-eter, double seam a flat bottom on it, and wirethe top with 54~ii^ch iron rod, which will make itstiff enough to withstand the pressure of to the bottom and 3 inches apart punchtwo holes, a and h, large enough to receive ^-inch galvanized pipe couplings.
. The art of lead burning; a practical treatise explaining the apparatus and processes. ect the hose tothe gasoline can, open the cocks and the appa-ratus is ready for use. Air Holder No. 2. To make the air holder shown in Fig. 11, takea sheet of No. 26 gauge galvanized iron 30 incheswide. Make it into a cylinder 26 inches in diam-eter, double seam a flat bottom on it, and wirethe top with 54~ii^ch iron rod, which will make itstiff enough to withstand the pressure of to the bottom and 3 inches apart punchtwo holes, a and h, large enough to receive ^-inch galvanized pipe couplings. Solder thesecouplings in place. On the inside of this tank and into thesecouplings screw two pieces of ^-inch pipe 4inches long w4th elbows pointing straight these elbows screw two pieces of ^-inchpipe long enough to come flush with the top ofthe tank F. On the outside of the tank and into THE ART OF LEAD BURNING. 47 the ^-inch couplings screw two ^-inch nip-ples 2 inches long, and on these nipples screwtwo ^-inch hose end gas cocks. Now, with the same sized sheet iron, make. Fig. II.—Ah- Holder No. 2. another tank 2 inches smaller in diameter thanthe first tank. This should have a flat bottom,and be wired as previously described. Then takefour strips of sheet iron 30 inches long and 2inches wide, and form each into V shape length- 48 THE ART OF LEAD BURNING. wise. Lay off the circumference of this tank infour equal spaces. One side of the V-shapedpieces should then be soldered on at each other side should be left loose to allow foradjustment. These pieces form the guides to theupper tank and prevent it from tipping sidewaysand binding. Two of the guides are shown inthe illustration, Fig. 11. The lower tank should now be filled aboutone-third full of water. The upper tank shouldthen be inverted and placed in it. The air pumpmust then be connected to one of the ^-inchcocks with a short piece of hose, and the airshould be pumped into it until the upper tankris
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