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
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.
advertiser Aluminium Company of America, agent Fuller Smith Ross, Inc.