Smithsonian Report, 1919.—Coville, PLATE 22. 
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AWAKENING OF LONG DORMANT PLANTS BY ARTIFICIAL CHILLING. 
Theillustration consists of two photographs of the same plant. At theleft is shown the condition of 
the plant on December 26, 1916, after more than a year of warmthand dormancy. The figure at the 
right, from a photograph taken April 27 1917, shows the appearance of the plant after it had been 
subjected to artificia lchilling for a period of three months and then had been returned to the warm 
pee house: Tt began to put out new growth from 10 or more ofits leafbuds. Even after its ex- 
raordinarily 
4 y long period of dormancy the plant had been brought back to normal activity by a 
suitable period ofchilling. (One-fifth naturalsize.) 
