SLA TE- SIDED GREENHU USE. 



129 



narrower, or say not more than 5 feet wide, and need not be stepped, this admitting of 

 all the plants being easily accessible — a very important matter when watering has to be 

 done with the greatest care. The stagings in this and all other cases should be of a 

 durable character, or constructed of material that will not quickly decay, and those at 

 the sides ought to be rather lower than the wall plate. If they are 3 feet above 

 the level of the floor, this will be found a good height for convenience and appearance, 

 and there will be less likelihood of the plants being injuriously close to the hot-water 

 pipes under them, than when the stages are lower. 



Pathways are frequently made too narrow for either enjoyment or utility. They 

 ought to be 3 feet wide — more rather than less. 



In Fig. 63 we have a modest span-roofed greenhouse, which may extend to any 

 length desired, in which also the interior arrangement of pipes and stages are shown. 



Fig. 63. Medium Span-Roofed Greenhouse. (Messengee's.) 



The width of this class of house may be 12 feet to 14 feet, and the ridge 9 feet or 

 10 feet high. The sides may be formed of slate as illustrated, or of light brickwork, 

 to a height of 3 feet, with side-hinged lights [a) 2 feet high. Houses of this description 

 are particularly well adapted to the growth of calceolarias, cyclamens, cinerarias, 

 primulas, pelargoniums, begonias, gloxinias, and others of a similarly free-growing 

 nature. 



If preferred, the interior arrangement may be altogether different. Market growers 

 find these span-roofed houses of good service all the year round. In their case they 

 are usually of considerable length, and not less than 14 feet wide (sec Structures, 

 vol. ir. s 



