ALCOA -ALUMINUM 66 They use an Aluminum dipper! What a dipper it is! So big that one load would completely fill a room in your house ten feet wide by eleven feet long. The dipper's work is "stripping the over burden," that being the name given the 1 5- to 50-foot thick layer of soil, shale and stone which covers the thin bed of coal lying under vast areas of Illinois prairie. Once this mammoth dipper uncovers the- bed of coal, it is a simple matter to load it into trucks or cars. Getting to the coal is the expensive thing. By using a dipper made largely of Alcoa Aluminum alloys the operators are cutting that digging expense approximately 30 per cent. For this dipper has a capacity of 32 cubic yards; the largest in the world. Yet it is operated by power equipment originally designed for a much smaller dipper made entirely of heavy metals. Therefore the same power equipment and the same number of men actually move 30 per cent more overburden in the same time, because the weight saved by using the light strong alloys of Alcoa Aluminum was put into extra dirt-moving capacity. For months on end, 24 hours a day, 7 days a week, this dipper has been operating, moving 30 per cent more load every time it swings. It can do these things because nature made Alumi num light, and research has made it strong. It is this unique combination of qualities that is causing streamline trains and buses and truck bodies to "go" Aluminum. That is why everything that moves or must be moved operates more economically when made light with Alcoa Aluminum. Engineers in many industries are finding new places every day where the lightness and strength of Alcoa Aluminum save power, and add convenience and mobility. With this saving, the user also gets superior resistance to corrosion, which assures long life and low maintenance. Aluminum Company of America, 2102 Gulf Building, Pittsburgh, Pennsylvania. ALCOA advertiser Aluminium Company of America, agent Fuller Smith Ross, Inc.

Modern Publicity en | 1937 | | page 70