Bul. 974, U. S. Dept. of Agriculture. PLATE XVII. 
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WINTER TWIG CUTTINGS ROOTING IN A COLDFRAME. 
The illustration, from a photograph taken on July 21, shows the cuttings at the time the roots 
| are forming. Under this procedure the cuttings are made in the fall, from naked twigs that 
have just dropped theirleaves. They are kept fora month at a temperature of about 60° F., 
during which time the cut surfaces heal by the formation ofa callus. They are then kept at 
a temperature of 40° F. or alittleless. In very early spring they are sect in the coldframe, 
and as the result of their previous chilling their buds begin to swell with the first warm 
} weather and thev put out new leafy twigs. Until this new leafy twig growth has been com- 
pleted, the cuttings can not form roots, 
