e rotation of the pipes, ing wheel on which are pivoted the inner ends of slid- and varying the fit by one-thousandth of an inch. the latter also carrying brushes in close proximity to able arms, whose outer ends are beveled and pass The micrometer screw has 50 threads to the inch and the surfaces… … ' willat the same time equal that in the lower portion WARNER & COOK'S TRACTION WHEEL. | of the filter, and the valve closing the outlet for im- opposite faces of the wheel on which the arms are pure water will be held down by the spring, aided by pivoted are connected with coil springs fastened on…
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