Some Effects of High Temperature on Polyploidy and Other Variations in Maize

7 Davidson and Bogert, forthcoming publication. 8 Davidson and Bogert, forthcoming publication. 9 Behrend, Ann. Chem., 245, 213 (1888); Behrend and Ernert, Ibid., 258, 347 (1890). 10 Angeli, Atti. accad. Lincei, [5] 3, II, 72 (1894). 11 Johnson, Baudisch, and Hoffmann, loc. cit. 12 Levene, Bass, and Simms, J. Biol. Chem., 70, 229 (1926). 13 Behrend and Roosen, Ann. Chem., 251, 235 (1889). 14 Behrend and Osten, Ann. Chem., 343, 133 (1905); Behrend and Beer, Ibid., 362, 115 (1908). 15 Levene, J. Biol. Chem., 63, 653 (1925). 16 Behrend and Koch, Ann. Chem., 315, 246 (1901); Behrend and von Vogel, Ibid., 259 (1901). 17 This reaction suggests a mechanism for the formation of 5-phenylhydrazinouracil from the action of phenylhydrazine on 5,5-dibromo-6-hydroxy-5,6-dihydrouracil which was observed by Levene: namely, the formation of uracil-5-azobenzene (much as given above) followed by its reduction to the hydrazo compound by the excess of phenylhydrazine present.