Sand Blast Apparatus

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“Sand Blast is one of the most wonderful uses of sand, by means of which glass, stone, metals, or any other hard substance may be cut or engraved. If a stream of sharp sand be let fall from a high box (as high as the ceiling of a room) through a tube on to a plate of glass held under it, the sand will cut away little grains of the glass till at length the whole surface will be cut or scratched and it will look like ground glass. If, instead of cutting the glass all over, it is wanted to engrave a pattern or figure on it, the workman has only to cover the parts of the glass which he does not want cut with a stencil plate made of leather, rubber, paper, wax, etc., for the sand will not cut any soft substance. Metals and stones may also be cut by means of the sand blast, which will not only scratch the surface, but will cut it away to any depth."—(Charles Leonard-Stuart, 1911)


Everybody's Cyclopedia (New York, NY: Syndicate Publishing Company, 1912)


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