GREENHOUSE AND WINDOW-GARDEN WORK. 159 



20 2.5 per cent. 



30 



40 

 50 

 60 

 70 

 80 

 85 



2.7 



3.4 



5.7 



11.2 



22.2 



41.2 



54.3 



7. Angle of Roof for Different Heights and Widths of House. 



(Taft.} 



Measuring the height directly under the ridge to a point on a 

 level with the bottom of the sash or eaves of the roof, and 

 measuring the width along this level to the eave, the table 

 gives the angles which the roof makes with the horizontal. 



8. Standard Flower-Pots. 



AMERICAN. 



The Society of American Florists has adopted a standard 

 pot, in which all measurements are made inside, and which 



