Volume 2

Ure's dictionary of arts, manufactures, and mines : containing a clear exposition of their principles and practice / by Robert Hunt. ; assisted by F.W. Rudler.

  • Ure, Andrew, 1778-1857.
Date:
1878-1979
Catalogue details

Licence: Public Domain Mark

Credit: Ure's dictionary of arts, manufactures, and mines : containing a clear exposition of their principles and practice / by Robert Hunt. ; assisted by F.W. Rudler. Source: Wellcome Collection.

    99/1060 (page 83)
    meter at the small end. At a speed of 20 revolutions per minute, the six trommels ■will dispose of from two to three tons per hour. The volume of water required per 658 trommel to_ keep the holes clear is from two to three gallons per minute. The order of sizing is from great to small grains; that is, the first or uppermost trommel has the coarsest holes; each succeeding trommel having holes of lesser diameter. Through this arrangement tlie smallest holes and thinnest plates get only a minimum amount of wear. In order to convey the stuff from one trommel to another sheet-iron or wooden hoppers are employed, iiach trommel is light, portable, and readily replaced. Instead of distributing the G U