plumming
Plum"ming, n. Etym: [See Plumb.] (Min.) Defn: The operation of finding, by means of a mine dial, the place where to sink an air shaft, or to bring an adit to the work, or to find which way the lode inclines.
Plum"ming, n. Etym: [See Plumb.] (Min.) Defn: The operation of finding, by means of a mine dial, the place where to sink an air shaft, or to bring an adit to the work, or to find which way the lode inclines.