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from the fertilized seed or some associated structure, to 

 increase the size of the fruit. 



Dr. Swingle found that certain pollen was very important 

 in its influence on the quality and time of maturity of the 

 fruit of the date. No one has found the substance or active 

 principle responsible for these fruit variations, and its 

 method of movement to the fruit is a mystery, but since we 

 know there must be something, it is not too much to expect 

 that we may some day influence the fruit by a chemical 

 spray. Certainly a new interesting field is opened for im- 

 provement of all kinds of fruits. 



REFERENCES 



Bailey, L. H., A Manual of Cultivated Plants, The Macmillan Co., 1924. 

 Hylander, C. J., The World of Plant Life, The Macmillan Co., 1939. 

 Pool, R. J., Basic Course in Botany, Ginn and Co., 1940. 

 Rickett, Harold William, The Green Earth, The Jaques Cattell Press, 1943. 

 Wilder, L. B., The Garden in Color, The Macmillan Co., 1918. 



