\Bead" proof`\
1. Among distillers, a certain degree of strength in
   alcoholic liquor, as formerly ascertained by the floating
   or sinking of glass globules of different specific
   gravities thrown into it; now ascertained by more accurate
   meters.
2. A degree of strength in alcoholic liquor as shown by beads
   or small bubbles remaining on its surface, or at the side
   of the glass, when shaken.