1914] 



DARSIE, ELLIOTT br PEIRCE— GERMINATING POWER 



121 



Inspection of table XI will show that the seeds of the crops of 

 1909 and of 191 1 gave considerably higher temperatures than the 

 older seeds of the four years preceding, but the results are not so 

 regular as an average of similar experiments on similar seeds of this 

 and other sorts might give. Not knowing the maturity of the seed 

 when harvested, the manner of its curing and storage, and various 

 other factors which might affect its vigor, we are dependent, in all of 

 these cases, upon the facts of age and vigor as shown by Dewar flask 

 and seed bed. We cannot further account for the differences. 



TABLE XII 











ATS NO. 293 











Date 



Time Room 



1007 



1908 



1909 



IQIO 



IQII 



April 2 



3 



4 



4 



J 



5 



6 



6 



7 



7 



8 



3:00 P.M. 

 9:00 A.M. 

 3:00 P.M. 

 9:00 A.M. 

 5:00 P.M. 

 9:30 A.M. 

 5:00 P.M. 

 8:00 A.M. 

 5:00 P.M. 

 8 : OO A.M. 

 StOO P.M. 

 8:00 A.M. 



i6?7 C 

 16.7 



16.6 



16.7 



16.7 



16.6 



16.7 



16.7 



16.7 



16.6 



16.7 



16.9 



if.% C. 



17.6 



17.7 



18.4 

 18.8 



20.2 



20. 2 



20. 1 



19.8 



19.2 



19. 1 



18.7 



i7? 3 C. 

 17.7 



17-85 



18.75 



19-35 

 20.5 



20.6 



20.3 



19.9 



19-3 



19 i5 

 18.6 



i7 c 



17 



18. 



18. 

 19. 

 19. 

 19. 

 19. 

 18 



18. 

 18. 

 18. 



6 



75 



5 

 



4 



4 



15 



9 

 6 



5 

 3 



i7?2 C. 



17-8 

 18. 1 

 19.2 

 20.0 

 21.2 



21.4 

 20.9 

 20.5 

 19.8 

 19.6 

 18.8 



17-3 C. 



18.4 



18.9 



21.8 



24.0 



27.8 



27.4 



24.4 



22.9 



21 .6 



21.2 



20. 1 



Increase in temperature bet 

 first and highest readme 



ween 



s 



4°7 



5°o 



4 ?2 



3-i 



O 







*J 





V 



temperature 



5-o 



prelim 



while the seeds were soaking in water, heat was also being liberated. 

 The rate of heat liberation at different stages in germination is not 

 uniform. This one of us w r ill show elsewhere, for it has little to do 

 with the special topic of this paper. 



Table XIII shows irregularities which we are unable to account 

 for, since we are unacquainted with the experience of the seeds 



into our hands: hut we include the table for the 



came 



com 



same 



germination 



