Common hotbed frames

1991. The common hotbed frame is a rectangular box of wood, bottomless, and highest at the side to be placed to the north, subdivided by cross-bars dovetailed into the outer frame, and each subdivision covered by a glazed sash. Knight, instead of having the north side of the frame highest, had all the four sides of equal height, but formed the basement of the dung-bed, and built the dung-bed itself, of the slope which he considered most suitable for the sashes of hotbeds.