Electric railway journal . The moldshould be vented by making holes with a No. 8 or No.10 gage steel wire so that all gases in the liquid metalcan escape readily. The

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Download this stock image: . Electric railway journal . The moldshould be vented by making holes with a No. 8 or No.10 gage steel wire so that all gases in the liquid metalcan escape readily. The patterns for the gate, riser andpreheating opening can be readily withdrawn by rappingthem slightly. A molders slick, trowel and lifter arevery useful for wiping away any loose sand that might but higher pressures can be safely used, as the tank istested to 250 lb. Valve B allows the compression air toflow into the top of the tank and places the gasoline orkerosene contained therein under pressure, driving itup through the pipe - 2CH0PYM from Alamy's library of millions of high resolution stock photos, illustrations and vectors.