26 GREENHOUSE CONSTRUCTION AND HEATING. 
or stuffy structures. In hot weather they do better at a 
moderate distance from the glass, and a through current of 
air being very advisable, plenty of bottom ventilation should 
be provided. A rather steep pitched roof is also best. In 
the case of houses facing south, shade on the sunny side 
should be afforded by means of a moveable blind. A house 
suitable for begonias in summer will answer capitally, if well 
heated, for flowering bouvardias or tree carnations in during 
the winter season. 
Fig 15. 
Stove Plants.—Low growing plants such « gloxinias, 
gesneras, achimenes, coleus, poinsettias, etc., succeed well 
‘in low and rather flat span-roofed houses, ch as that 
shown in Fig. 15, with plenty of heating pover. Tropical 
subjects of taller habit, including large palms, musas, 
bamboos, ferns, also large specimen draenas, crotons, 
and so forth, need a loftier structure, of curse, but of the 
same type. But little ventilation is usally required in 
such structures, especially if lofty ; yet itis usual to fix a 
