DORMANCY IN SEEDS 135 



51. Gadd, I., "On methods for the ehmination of seed dormancy in seed control 



work," Internal. Seed Testing Assoc. Proc, 11 : 108-118 (1939). 



52. Gassner, G., "Beitrage zur Frage der Lichtkeimung," Zeitschr. Bot., 7:609-661 



(1915). 



53. Giersbach, J., "After-ripening and germination of Cotoneaster seeds," C. B. T. I., 



6:323-338 (1934). 



54. , "Germination and seedling production of Ardoslaphylos uva-ursi," C. B. T. /., 



9 : 71-78 (1937). 



55. , "Germination and seedling production of species of Viburnum," C. B. T. I., 



9 : 79-90 (1937). 



56. , and L. V. Barton, "Germination of seeds of the silver bell, Halesia Carolina," 



C. B. T. I., 4 : 27-37 (1932). 



57. Grimm, K , "Uber die Keimung des Klees und aussere Einfliisse auf diese," Bot. 



Arch., 21: 344-445 (1928). 



58. Hamly, D. H., "Softening of the seeds of Melilotus alba " Bot. Gaz., 93 : 345-375 



(1932). 



59. Harrington, G. T., "Agricultural value of impermeable seeds," /. Agric. Res., 



6 : 761-796 (1916). 



60. , "Further studies of the germination of Johnson grass seeds," Proc. Assoc. 



Off. Seed Anal. N. Am., 9 10(1916-1917) : 71-76 (1917). 



61. , "Forcing the germination of freshly harvested wheat and other cereals," 



/. Agric. Res., 23 : 79-100 (1923). 



62. Harrington, J. B., and P. F. Knowles, "The breeding significance of after-harvest 



sprouting in wheat," Sd. Agric, 20 : 402-413 (1940). 



63. Hohnel, F. von, "Ueber die Ursache der Quellungsunfahigkeit von Legumenosen- 



samen und der Einfiuss der chemisch-physikahschen BeschafiFenheit der Pallisa- 

 denschicht auf die Keimfiihigkeit derselben. WissenschaftUchpraktische 

 Untersuch," Gebiete Pflanzenbaues, 1 : 80-88 (1875). 



64. Hiibner, R., "Untersuchungen liber die Hartschahgkeit der Zottelwicke und ihre 



Behebung auf ziichterischem Wege," Landw. Jahrb., 85 : 751-789 (1938). 



65. Hutton, Mary Erne-Jean, and R. H. Porter, "Seed impermeability and viability 



of native and introduced species of Leguminosae," Iowa State Coll. J. Sci., 

 12 : 5-24 (1937). 



66. Jensen, C., "Is it possible that seeds through treatment with light may keep their 



germinating power through a longer span of years than normal?" 16 pp., 

 J. D. Quist & Co., Copenhagen, 1941: Abstr. in Exv. Sta. Rec, 86:343 

 (1941). 



67. Johnson, L. P. V., "General preliminary studies on the physiology of delayed 



germination in Avena fatua," Canadian J. Res. (Sec. C), 13 : 283-300 (1935). 



68. Johnstone, G. R., and T. S. Clare, "Hastening the germination of western pine 



seeds," /. Forest, 29 : 895-906 (1931). 



69. Jones, H. A., "Physiological study of maple seeds,"Bot. Gaz., 69 : 127-152 (1920). 



70. Jones, J. P., "A physiological study of dormancy in vetch seed." New York 



[Cornell] Agric. Exp. Sta. Mem. No. 120, 50 pp., 1928. 



71. Kommerell, E., "Quantitative Versuche iiber den Einfluss des Lichtes verschiedener 



Wellenlangen auf die Keimung von Samen," Jahrb. Wiss. Bot., 66 : 461-512 

 (1927). 



72. Kroeger, G. S., "Dormancy in seeds of Imvatiens balsamina L.," C. B. T. I., 



12:203-212 (1941). 



73. Lakon, G., "Topographischor Nachweis der Keimfahigkeit der Gotreidefriichte 



durch TetrazoHumsalze," Ber. Deutsch. Bot. Ges., 60 : 299-305 (1942). 



74. Lammerts, W. E., "Effects of photoperiod and temp)erature on growth of embryo- 



cultured peach .seedlings," Am. J. Bot., 30 : 707-711 (1943). 



75. Lute, A. M., "Alfalfa seed made permeable by heat," Science, 65 : 166 (1927). 



