LITEEATURE 275 



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 ITS Peael, R. : Modes of Research in, Genetics. New York, 1915, 



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 1'^* Peakl, R. : Some Further Considerations Regarding Cousin and 



Related Kinds of Mating. Amer. Nat., 1915, xlix, 570-575. 

 178 Peakl, R. : Some rurther Consideirations Regarding the Measure- 

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 IT 7 Pearsoit, K. : On a Generalized Theory of Alternative Inheritance, 



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178 Phillips, J. C. : Size Inheritance in Ducks. Jour. Exp. Zool., 



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179 Phillips, J. C. : A Further Study of Size Inheritance in Ducks, 



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180 PiATE, L. : Vererbungslehre. Leipzig, 1913, pp. 519. 



181 PoPENOE, p., and Johnson, R. H.: Applied Eugenics. New York, 



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 183EIPLET, "W. Z.: The Races of Europe. New York, 1899, pp. 624. 

 i»4 Ritzema-Bos, J. : Untersuchungen fiber die Folgen der Zucht m 



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185 Roberts, H. F. : First Generation Hybrids of American and Chi- 



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186 RoBBiNS, R. B. : Some Applications of Maithematies to Breeding 



Problems. I, II, III. Genetics, 1917, ii, 489-504; 1918, iii, 73- 

 92; 1918, iii, 375-389. 



187 Bobbins, R. B. : Random Mating with the Exception of Sister by 



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