Note 1 — Chapter II · HOTBEDS, COLD FRAMES AND FLATS

Or a trench as deep as the completed pit and as narrow as can be handled may be dug to outline a pit of the required dimensions, and filled with grout, well tamped down; when this has had time to harden sufficiently, the earth may be removed from the center and the cement given a finishing coat, and the wall brought to the required height above ground by the aid of a frame of boards.