%bolting%

n. 1. A sifting, as of flour or meal. [ 1913 Webster ]

2. (Law) A private arguing of cases for practice by students, as in the Inns of Court. [ Obs. ] [ 1913 Webster ]

Bolting cloth, wire, hair, silk, or other sieve cloth of different degrees of fineness; -- used by millers for sifting flour. McElrath. --
Bolting hutch, a bin or tub for the bolted flour or meal; (fig.) a receptacle. [ 1913 Webster ]