GREENHOUSE FIGURES 199 



Angle of roof for different heights and widths of house (Taft) 



Among greenhouse builders, 32 is the pitch of roof that has 

 practically been established for all houses up to 25 feet in width ; 

 beyond that width, 26 is commonly used for the slope or pitch 

 of the roof. 



Standard flower-pots. 



American 



The Society of American Florists has adopted a standard pot, in 

 which all measurements are made inside, and which bears a rim or 

 shoulder at the top. The breadth and depth of these pots are the same, 

 so that they " nest " well. 



English. Chiswick Standards 



