1914] 



DARSIE, ELLIOTT fir PEIRCE— GERMINATING POWER 



109 



The foregoing records have shown that there is a decrease in the 

 amounts of heat liberated by germinating seeds of certain sorts as 

 the seeds increase in age. In order to ascertain whether there is any 

 proportional relationship between the respiratory activity, as indi- 

 cated by the heat yield, and the germinating power, we still further 

 tested some of the seeds used in the foregoing experiments by setting 

 them out to germinate. Five lots of barley, those from Wisconsin 

 and the no. 202 above, together with three more from Ames, Iowa, 



TABLE IV 



No. 364. . 



No. 294. . 



Xo. 304. . 



Wisconsi n 



Xo. 202. . 



Year 



1909 

 1910 

 1911 

 1909 

 1910 

 1911 

 1909 

 1910 

 1911 



1905 

 1906 



1907 



1908 



1909 



1910 



1911 



1909 



1910 



1911 



Number sprouting April 



25 



17 

 16 



3i 



19 

 21 



27 



26 



24 



38 

 17 



3 

 6 



26 



41 

 29 



28 



12 



18 



18 



26 



25 

 22 



37 



27 



25 

 38 



29 

 24 



45 

 26 



23 

 12 



38 

 46 



4i 



39 

 29 



35 

 41 



27 



38 



27 

 46 



43 

 32 



49 



4i 



28 



45 



28 



40 



29 

 18 



42 



49 



47 

 42 



40 



40 



47 



Per- 

 cent- 

 age 

 spr. 



28 



76 



54 



92 

 86 



64 



98 

 82 



56 

 90 



80 



58 

 36 

 84 



98 



94 



84 

 80 



80 

 94 



Lengths of plumules in cm. 



April 27-28 



Shortest Longest 



Av. 



Percent 



age 

 growth 



1.4 



7-8 



3-5 



1.0 



8.1 



55 



2.4 



7-5 



4-7 



1.0 



7-7 



5-3 



1.0 



8-7 



6.9 



1.0 



8.9 



6.1 



i-3 



8-5 



6.0 



o-5 



7-9 



6-5 



1.0 



9 5 



6.6 



o-5 



8.9 



5-3 



1 .2 



8.9 



5-9 



1.0 



7.6 



4-2 



03 



i°-5 



6.8 



3-5 



1° 5 



8.1 



2.0 



9 7 



6.7 



2.2 



8.4 



6-5 



1.6 



7-5 



5-4 



3-5 



8.1 



6-5 



i-5 



9.8 



6-5 



43 

 67 



58 



65 

 8-5* 



75 



74 

 80 



81 



65 



72 



5i 

 83 1 



82 

 80 



66 

 80 

 80 



urn 



t Lengths measured April 28. 



were selected for the test. Fifty kernels of each year in each of the 

 live lots were soaked for 24 hours in boiled distilled water. They 

 were then planted in rows in shallow boxes of sand which had pre- 

 viously been steamed for three hours in an Arnold steam sterilizer 

 and allowed to cool. The boxes were then set on the benches in the 

 greenhouse awaiting germination. The date was April 22, 1913. 

 I'he w r eather was very warm at this time. This partly accounts for 

 the very quick response of these seeds. The data are in table IV. 



