The Collaborative International Dictionary of English v.0.48:

Dredger \Dredg"er\, n. (Cookery)
   A box with holes in its lid; -- used for sprinkling flour, as
   on meat or a breadboard; -- called also dredging box,
   drudger, and drudging box.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Drudger \Drudg"er\ (dr[u^]j"[~e]r), n.
   1. One who drudges; a drudge.
      [1913 Webster]

   2. A dredging box.
      [1913 Webster]