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27. Davis, W. E., and R. Catlin Rose, "The effect of external conditions upon the after- 



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28. Deming, G. W., and D. W. Robertson, "Dormancy in small-grain seeds," Colorado 



Agric. Exp. Sta. Tech. Bull. No. 5, 12 pp., 1933. 



29. Dinnis, E. R., and S. Jordan, "The germination of freshly harvested and of stored 



seeds of sea pea," J. South East. Agric. Coll. (Wye, Kent), 44 : 140-142 (1939). 



30. Eckerson, S., "A physiological and chemical study of after-ripening," Bot. Gaz., 



55 : 286-299 (1913). 



31. Esdorn, I., "Der Einfluss der Lagerung auf die Keimfiihigkeit der gelben Lupine," 



Fortschr. Landw., 3 : 346-353 (1928). 



32. , and H. Stiitz, "Die Bewertung harter Leguminosensamen," Landw. Versuchs- 



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33. Eyster, W. H., "Vivipary in maize," Genetics, 16 : 574-590 (1931). 



34. Flemion, F., "After-ripening, germination, and vitality of seeds of Sorbus aucuparia 



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35. , "Physiological and chemical studies of after-ripening of Rhodotypos kerrioides 



seeds," C. B. T. I., 5 : 143-159 (1933). 



36. , "Dwarf seedUngs from non-after-ripened embryos of Rhodotypos kerrioides," 



C. B. T. /., 5 : 161-165 (1933). 



37. , "Physiological and chemical changes preceding and during the after-ripening 



of Symphoricarpos racemosus seeds," C. B. T. I., 6 : 91-102 (1934). 



38. , "Dwarf seedlings from non-after-ripened embryos of peach, apple, and 



hawthorn," C. B. T. I., 6 : 205-209 (1934). 



39. , "A rapid method for determining the germinative power of peach seeds," 



C. B. T. I., 8 : 289-293 (1936). 



40. , "A rapid method for determining the viability of dormant seeds," C. B. T. /., 



9 : 339-351 (1938). 



41. , "Breaking the dormancy of seeds of Crataegus species," C. B. T. I., 9 : 409- 



423 (1938). 



42. , "Further studies on rapid determination of the germinative capacity of 



seeds," C. B. T. /., 11 : 455-464 (1941). 



43. , "Effect of the addition of nitrogen upon germination of seeds of Symphori- 

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44. , and E. Parker, "Germination studies of seeds of Symphoricarpos orbiculatus," 



C. B. T. I., 12 : 301-307 (1942). 



44a. , and E. Waterbury, "Further studies with dwarf seedlings of non-after- 

 ripened peach seeds," C. B. T. /., 13 : 415-422 (1945). 



45. Flint, L. H., "Sensitivity of dormant lettuce seed to light and temperature," 



J. Washington Acad. Sci., 25 : 95-96 (1935). 



46. , and E. D. McAhster, "Wave lengths of radiation in the visible spectrum 



inhibiting the germination of light-sensitive lettuce seed," Smithsonian Inst. 

 Publ. No. 3334, 11 pp., 1935. (Smithsonian Misc. Coll. v. 94. No. 5.) 



47. , and C. F. Moreland, "Response of lettuce seedlings to 7600 A radiation," 



Am. J. Bot., 25 : 12s (1938). 



48. , , "Response of lettuce seedlings to 7600 A radiation," Am. J. Bot., 



26 : 231-233 (1939). 



49. Funke, H., "Beitriige zur Kenntnis von Keimung und Bau der Mistel," Bot. 



Centralbl. Beih. A, 69: 235-274 (1939). 



50. Gadd, I., "Ueber die Natur der Hartschaligkeit der kleinsamigen Leguminosen und 



den Einfluss der Lagerung auf dieselbe," Internat. Seed Testing Assoc. Proc, 

 10 : 146-174 (1938). 



