Bui, 974, U. S, Dept, of Agriculture. 



Plate XII. 



Fig. I. — Blueberry Propagation Frames Shaded with Muslin. 



Each sa.sh is of the standard size, 3 feet wide and 6 feet long. The wooden sides of the cold- 

 frames rise 2 feet from the ground at the baclc and 1 foot at the front. The lowest part of 

 the roof joists is BJ feet above the ground. 



Fig. 2. — Blueberry Propagation Frames with Slat Shades. 



Each sash has a separate, removable cover of builders' lath. The laths are separated from 

 each other by a distance equal to the thickness of a lath. The posts shown in the illustra- 

 tion and the framework supported by them were originally made to carry muslin shades. 

 They are not needed when slat shades are used. 



