Samuel Blatchford, Estey v. Burdett — Opinion of the Court
“ The main board, A, contains two sets of reeds running through the entire scale, the back set of which is marked a, and is tuned as a unison or diapason, while the front or octave set, marked b, is tuned an octave above the diapason. In the arrangement of these reeds, it will be seen that the lowest and longest reeds in the diapason and the octave sets are placed with their vibrating ends as near together as they can be, with room only for the tracker-pin which communicates the motion of the key to the valve beneath the reeds. ”
