Lucifer Furnaces Inc., Warrington, Pa., issued a 4-pbrochure on its line of 5000 Series heavy-duty electric production furnaces. The brochure includes normal air models (5000 Models), atmosphere furnaces designed with alloy muffles (AM Models), removable alloy muffles (RAM Models), Elevator Quench (EQ Models) and atmosphere furnaces controlled with a gas-tight shell (GT Models). The brochure describes general construction features, available options and detail specification charts including chamber dimensions, overall sizes, power requirements and weights for each model.