employ the prisoners committed, or transferred thereto, in work on
or about the buildings and farm, and in growing produce and supplies
for its own use, and for the other institutions of the Commonwealth,
in the preparation of road materials and in making brick, tile,
paving material, and such other products or materials as may be
found practicable for the use of the Commonwealth, or any political
subdivision therein, and in other industries which may be approved by
the board of managers of the State industrial farm and the Committee
on Delinquency of this Commonwealth. Should any State industrial farm
produce supplies or materials in excess of its needs and demands, or
in excess of the demands of the Commonwealth, or of any political
subdivision thereof, such surplus may be sold by the Committee on
Delinquency at the prevailing market price.