CHAPTER II. 
DIFFERENT FORMS OF GREENHOUSES, 
ETC. 
THERE are three chief or principal forms of greenhouses, 
viz., the span-roofed (Fig. 1), the lean-to (Fig. 2), and the 
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three-quarter span, or hip-roofed (Fig. 3). Of these the 
first is the most suitable for all ordinary purposes and. 
