RESISTANCE OF PLANTS 393 



and R. C. Wright. Frost injury to tomatoes. U. S. Depl. Agr 



Bull., 1099: 1-10, 1922. 

 HoLBERT, J. R. Corn more resistant to cold when grown on soil rich in 



plant food. U. S. Dept. Agr. Year Book, 1931: 160-164, 1931. 

 Lepeschkin, W. ''Kolloid Chemie des Protoplasmas." Julius Springer, 



Berlin. 1924. 

 Lewis, F. J., and G. M. Tuttle. Osmotic properties of some plant cells 



at low temperature. Ann. Botany, 34: 405-416, 1920. 

 and . On the phenomena attending seasonal changes in the 



organization in the leaf cells of Picea canadensis. New Phytologist, 



22 : 225-232, 1923. 

 LiDFORSS, B. Zur Physiologic und Biologic der wintergrune Flora. 



Botan. Centr., 68: 33-44, 1896. 

 . Die wintergrune Flora. Fine biologische Untersuchung. Lunds 



Univ. Arskrift. Abstr. Bot. Centbl. 110: 291-293, 1909. 

 M.\xiMOV, N. A. Zur Frage liber das Erfrieren der Pflanzen. Botan. 



Centr., 110: 597-598, 1909. 

 : Experimentelle und kritische Untersuchungen liber das Gefrieren 



und Erfrieren der Pflanzen. Jahrb. iviss. Botanik, 53: 327-420, 1914. 

 . Internal factors of frost and drought resistance in plants. Proto- 



plasma, 7: 259-291, 1929. 

 Meyer, B. S. Factors in the frost resistance of the leaves of native Ohio 



evergreens. Am. Jour. Botany, 14: 624, 1927. 

 •. Seasonal variations in the physical and chemical properties of the 



leaves of the pitch pine, with special reference to cold resistance. Am. 



Jour. Botany, 15 : 449, 1928. 

 Mez, C. Einige Pflanzengeographische Folgerungen aus einer neuen Theorie 



liber das Erfrieren eis-bestandiger Pflanzen. Englers botan. Jahrb. 



Beibl., 34: 40-42, 1905. 

 . Neue Untersuchungen iiber das Erfrieren eisbestandiger Pflanzen. 



Flora, 94: 89-123, 1905. 

 MoLiscH, H. ''Untersuchungen iiber das Erfrieren der Pflanzen." Jena. 



1902. 

 MuLLER Thurgau, H. tlbcr Zuckeranhaufung in Pflanzentheilen infolge 



neider Temperatur. Landw. Jahrb., 11: 757-818, 1882. 

 . tJber das Gefrieren und Erfrieren der Pflanzen. Abs. botan. 



Centr., 8(29): 76-81, 1887. 

 Newton, R. A comparative study of winter wheat varieties with special 



reference to winter-killing. Jour. Agr. Sci., 12: 1-19, 1922. 

 . The nature and practical measurement of frost resistance in 



winter wheat. Univ. Alberta Coll. Agr. Res. Bull., 1: 1-53, 1924. 

 . Colloidal properties of winter wheat plants in relation to frost 



resistance. Jour. Agr. Sci., 14: 178-191, 1924. 



— and J. A. Anderson. Respiration of winter wheat plants at low 

 temperatures. Can. Jour. Res., 5: 337-354, 1931. 



— and W. R. Brown. Seasonal changes in the composition of winter 

 wheat plants, in relation to frost resistance. Jour. Agr. Sci., 16: 

 522-538, 1926. 



