LITERATURE CITED 



( 1 ) BALLOU, F. H. 1909. Report of the Division of Horticultural Inspection. Ohio Agr. 



Exp. Sta. Circ. 94. 



( 2 ) BALLOU, F. H. 1917. Letters to C. S. Pomeroy, U. S. Dept. Agr. 

 ( 3 ) BATESON, WILLIAM. 1902. Mendel 's Principles of Heredity. 

 ( 4 ) BEACH, S. A. 1905. The Apples of New York. N. Y. Agr. Exp. Sta. Kept. 1903, 



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 ( 5 ) BEATTY, F. E. 1905. Improving Strawberries by Selection. In Proc. 2nd meeting 



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( 7 ) CALDWELL, J. 1874. Sports in Sugar Cane (in Mauritius). Gardeners Chron., p. 316. 

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 ( 9 ) CASTLE, W. E. 1914. Pure Lines and Selection. In Jour. Hered., v. 5, no. 3, pp. 



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(10) CASTLE, W. E. 1917. The Role of Selection in Evolution. In Jour. Wash. Acad. Sci., 



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(11) COATES, LEONARD. 1920. Prunes. In Catalog, Coates Nursery Co., Inc., Morganhill, 



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(12) CONNOR, O. W. 1915. Connor Prolific Grapefruit. In Catalog Ocklawaha Nurseries, 



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(13) CRAMER, P. J. S. 1907. Kritische Uebersicht der bekannten Falle von Knospenvaria- 



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(14) DARWIN, CHARLES. 1859. The Origin of Species by Means of Natural Selection. 



(15) DARWIN, CHARLES.. .1868. The Variation of Animals and Plants under Domestication. 



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(16) DEERR, NOEL. 1911. Cane Sugar. London. Illus. 



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(18) DORSET, M. J. 1917. The Inheritance and Permanence of Clonal Varieties. In 



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(19) EAST, E. M. 1910. The Transmission of Variations in the Potato in Asexual Repro- 



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(20) AND HAYES, H. K. 1911. Inheritance in Maize. Conn. Agr. Exp. Sta. 



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(21) EMERSON, R. A. 1913. The Inheritance of a Recurring Somatic Variation in Varie- 



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(22) FARMER, L. J. 1911. Fall Bearing Strawberries. In Farmer on the Strawberry, 



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(23) FARMER, L. J. 1918. The Oswego Apple. In Spring and Fall Special Price List, 



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(24) FLETCHER, S. W. 1910. Mich. Agr. Exp. Sta., Spec. Bui. 44; Chesebro Spy Apple, p. 



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(26) GILBERT, A. W. 1917. The Potato. New York. 



(27) GRIFFITHS, DAVID. 1913. Behavior, under Cultural Conditions, of Species of Cacti 



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(28) HEDRICK, U. P. 1915. Remarkable Sports of the Twenty-Ounce Apple. The Rural 



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