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Yol. II, No. 4 
JOHANNSEN, W. 
1913. Mutations dans des lign6es pures de haricots et discussion au sujet de la 
mutation en g6n6ral. In IV® Conf. Intemat. G6n6tique, Compt. Rend, 
et Rap., 1911, p. 160-163. 
Kearney, T. H. 
1910. Breeding new types of Egyptian cotton. U. S. Dept. Agr. uur. Plant 
Indus. Bui. 200, 39 p., 4 pi. 
Kiessling, Ludwig. 
1912. Uber eine Mutation in einer reinen Linie von Hordeum distichum L. 
In Ztschr. Indukt. Abstam. und Vererb., Bd. 8, Heft p. 48-78. 
Tower, W. L. 
1910. The determination of dominance and the modification of behavior in 
alternative (Mendelian) inheritance, by conditions surrounding or 
incident upon the germ cells at fertilization. In Biol. Bui., v. 18, no. 
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Vries, Hugo de. 
1901-1903. Die Mutationstheorie ... 2 v., illus. Leipzig. 
1909-10. The Mutation Theory ... Translated by J. B. Farmer and A. D. Dar- 
bishire. 2 v., illus. Chicago. 
Watt, George. 
1907. The Wild and Cultivated Cotton Plants of the World ... 406 p., illus. 
London, New York. 
PLATE XVII 
Field of Egyptian cotton (Gila variety) in blossom at the Cooperative Testing and 
Demonstration Gardens, Sacaton, Ariz., on July 15, 1913. 
