By floodlighting greenhouses with artificial sun rays and cutting 10 hours off the sleeping time of asters, dahlias, sweet peas and pansies, the horticultural department of Purdue University, Indiana, claims to have discovered a commercially successful method of making these flowers bloom as profusely in winter as in midsummer.
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Southland Times, Issue 22146, 14 October 1933, Page 12
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49Untitled Southland Times, Issue 22146, 14 October 1933, Page 12
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