1914] 



DARSIE, ELLIOTT &■ PEIRCE— GERMINATING POWER 



"3 



Experiment IV. — Cory sweet corn, white cob, bought of C. C. 

 Morse & Co., seedsmen, San Francisco, in 1908 or 1909 and 191 1 

 or 191 2, and purporting to be of the crops of 1908 and 191 1, respec- 

 tively; 30 grams of each, thoroughly washed in a 10 per cent aque- 

 ous solution of copper sulphate and then rinsed in boiled distilled 



A 



B 



Fig. 5. — Red clover: A, 1904; B, 191 1 



water at room temperature, were put in silvered Dewar flasks and 

 soaked for 24 hours in boiled distilled water. This was poured off 



Date 



March 15 



16 



17 

 18 



18 



19 



19 



20 



20 

 21 



; tempera t 

 March is. 



Time 



Hours 

 elapsed 



1 • 



12:30 P.M. 

 11:30 A.M. 

 10:30 A.M. 



9:30 A.M. 



5:00 P.M. 



9:00 A.M. 



5:00 P.M. 



9:30 A.M. 



4:30 P.M. 



9:00 A.M. 



* * 



23 

 46 



69 



76.5 



925 



IOO.5 



II 7 

 124 



140 



was taken. The experiment 

 The data are given in table VI. 



TABLE VI 



Room 



Max. 



Min. 



1908 



IQII 



i7°6C 



16.9 



17.0 



17.0 



17.0 



17.0 



17.0 



17. 2 



17.0 



17.0 



i7?2iC. 



17.16 



17.16 



17. 16 



17.16 



i6?oi C 



16.01 



16.06 



16.06 



16.06 



17.16 



16.01 



i7?ooC 



17.00 



16.90 



16.90 



17.00 



17-75 

 18.25 



18.75 

 18.56 



18.40 



i7?ioC 



1715 

 18.70 



20.75 



2145 



23.00 



23.70 



24-45 



24-45 

 24 30 



On opening the flasks, both sets of seeds were found to be 

 infected with mold, but with more on the older seeds than on the 



