-9- 



solution] v/ould produce germination and grov/th results 

 noticeably different from those of other salt combinations, 

 and that the same salt combination would produce noticeably 

 different results according to the temperature employed. 

 As it turned out, the salt combinations, as such, were ap- 

 parently without any clearly and easily indicated influence 

 upon the growth phase studied, for any of the seven tempera- 

 tures tested ( although the study yielded several suggestions 

 as to salt influence), but the temperatures tested showed a 

 marked t«mpexatua?^ influence on the germination and early 

 growth of this wheat. 



The experimentation here reported was performed in 

 the Laboratory of Ilant Physiology of the Johns Hopkins 

 University, with financial aid from the National Research 

 Council and with personal guidance and cooperation of 

 Professor Burton E, Livingston, director of the laboratory. 

 The experimental work was begun in the fall of 1918 and 

 completed the following August. The numerical data ob- 

 tained were studied by the writer upon his return to the 

 University of California, where the present paper was 

 prepared. The appreciative thanks of the writer are due to 

 Professor Livingston, not only for the facilities of the 

 Laboratory of Plant Physiology of the Johns Hopkins 

 University, but also for his advice and criticism during 

 the progress of the experimentation and later while the 

 present paper was in preparation. 



