Greenhouse Construction 



that we cannot go, for the intending possessor will 

 know these governing circumstances better than any one 

 else. Now, as to the form there is a large range of 

 choice. There are three principal types, known as the 



FIG. 67. 

 Lean to. 



FIG. 68. 

 Hip-roofed. 

 Greenhouses. 



FIG. 69. 

 Span-roofed. 



"lean-to," the "hip-roofed" or three-quarter span, and 

 the "span-roofed," which are here shown (Figs. 67-69); 

 but there are also many modified forms, some of which 

 take fantastic and useless shapes, such as are figured in 



FIG. 70. 



FIG. 71. 

 Undesirable forms of houses. 



FIG. 72. 



Figs. 70-72. Any of these latter shapes should be 

 sedulously avoided, no matter how much they may appeal 

 to architectural tastes; for it is demonstrated by experi- 

 ence that curvilinear roofs are not so favourable to the 



proper development of plants as in the case of a plain 

 in 



