be easily packed up conveniently for carriage. They consist, first, of the ground sill, which may be of teak, if the expense is not an object., seven inches wide, by four inches in thickness,
REMOVEABLE GEEENHOUSE.
the four sides of which are held together at the angles by means of irons screwed on with square-headed screws (Fig. 9a). No pegs or nails are to be driven into any of the mortise tenons, but in every part use, in lieu thereof, either the screws Fig. 9a or Fig. 9b. The studs are mortised into the sill, and have a substance of four and a half inches by four inches; and these again are mortised into the rafter-plate (see section, Fig. 11). Between these studs (see section. Fig. 10) the sashes (b) are set up, and to keep them steadily in their places splines (e) are braded on to the studs. These sashes may be exactly like those used in house building, without, of course, the accompaniment of boxes and weights. Upon the front of the stud a half-circular moulding (c) may be braded to give a degree of lightness to the appearance. Also to the same end, as well as to throw off water, let the sill be bevelled at d. Above the sashes are to be hung on pivots smalllights for ventilation. These may be opened and kept so by means of a small iron having holes in it, to drop on to a pin fixed in the lower sash (Figs. 11—5). This iron must also have a joint so as to hang down when the ventilator is shut. The
