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, ia 

 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 



