all boys who gather upon one shaft. The high pressure cylinder is 21 erful suction dredges which are associated with the inches in diameter; the intermediate, 34 inches; and about him. name of Lindon W. Bates, an American engineer. In The blind man's tools are a jack-knife and a tub of the low… … the dredge and hinged upon a common horizontal Fig- 1. Fig. 2. in swinging the dredge to right or left when the oper- axis on the dredge. They are raised and lowered by ation of dredging is in process. The twin propellers at means of derricks, two of which are attached at each HOW THE FANS ABE…
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