SEPTEMBER. 
283 
The frame is made of the best red Deal, cut out and well seasoned 
before putting together. The box is of 1^ stuff, with sunk joints, 
and tongued, to make it air-tight; all the joints are well painted when 
put together. The light is of 3 X stuff, the lower box being 4 X If, 
strengthed by a three-eighths iron rod across the centre. The glass is 
in single panes 40 X T2 inches, 26 oz. to the foot. There are 
six ventilators,—one long one in front, three in the back, and one in 
each end; these are kept open by hooks and eyes, and closed with an 
iron or brass button, and the edges and openings in the frame are 
bevelled to make them air tight. The light is fastened to the frame at 
the back, or higher side, by three strong brass hinges (all the hinges 
should be of brass), and is kept open by two long and flat iron supports 
perforated every five inches with holes to receive iron pins, which are 
fixed to the lower ends and middle of the light. These irons move on 
Front view of frame, open, showing calico wings, which can be brought close, if 
needed, to keep off wind. 
B. Calico wing. 
a stout pin fixed to a flat iron plate about 3| inches square, which 
is screwed to the frame; the pin must be long enough to allow the 
rods to move at a moderate angle. There are two handles at each end, 
to enable the frame to be more easily moved. The strip which is 
usually fixed to the sides of the frame, to keep the light in its place, is 
to be attached to the light in this case. The light is to be made so 
much wider than the frame as to allow it to extend beyond it 1J inch 
at the back and 2 inches in front, to throw the wet clear of the sides ; 
a groove is cut from end to end on the underside of the light before and 
behind, to prevent the rain running down the glass when open or 
shut; each pane being of one piece there is no drip. 
The plants are placed on strips of deal lfxf inch, which are 
supported by three platforms, or flat pieces of board, cut into as many 
steps as the frame will hold rows of pots ; these platforms fit into grooves, 
and can be raised or lowered at pleasure. The usual plan is to place 
them so that the bottom of the pot is twelve inches from the top of 
