Iles, George, 1852-1942 · New York, H. Holt and company · leaf 444
eam mix. 26, Cone. BENJAMIN C. TILGHMAN 383 induced him to repeat as an experiment what he first beheldas an accident. He soon discovered that a blast of sharpsand wrought as deep an incision in one minute as wind-blown sand in a year. In an early test he cut a hole oneand one-half inches wide in a… … The Tilghman Sand-blast Machine 20 pounds to be enough. In economy his first apparatushas never been surpassed. A small annular jet of steamescaped into a wide tube, inducing a current of air througha narrow central tube. This air carried sand as it fellfrom a hopper, which became thoroughly mixed…
Inventors
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