the disk, A, at the same time from its great practical value, which has been demon- series in which the same principle will be made avail- constantly changing the plane of its revolution. As the strated by trial on three of Cromwell’s propellers on the able, was patented by the inventor, Alban… … metallic wheel or disk which is caused to out. A moderately cool cellar is the best rotate rapidly on its axle, B. The axle of place to keep it.’ Fill up occasionally, wheel, A, is made in two parts, one on each side of the in the same plane of revolution, this forcible change in either from juice…
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