Trade Catalogs on Water Heating and Conditioning Systems and Sewage and Disposal Systems: Attic Fan, Gas Gravity Furnace, Winter Air Conditioner, Gas Floor and Wall Furnaces, Gas Console Heater, Gas Wall Heater, Coal Stokers and Furnaces, Coal Bin Feed Stoker, Coal Commercial and Industrial Stokers, Oil Space Heater, Evaporative Cooler, Gas Water Heaters, Electric Water Heaters, Oil Water Heaters, Water Softener, Water Tanks ; Numerical Positioning Controls for Machine Tools, and Highway-guard Rail and Attaching Brackets