io6 



BOTANICAL GAZETTE 



[august 



difficulties in the wav of sterilization, and suggests various method 



purposes 



were the least objectionable 



obviously 



tion is to be generally practiced, to have a less powerful general 



sublimate 



some 



have walls so easily penetrated by the poison that it is only too 

 easy to injure or even to kill them. Several of our experiments 



from 



seemed 



be particularly susceptible, presumably on account of the small size 

 of the seed and its thin and permeable coat. 



Experimental work 



We made germination experiments, both in Dewar flasks and 

 in seed beds, on barley, clover, corn (Cory sweet corn), hemp, oats, 

 and wheat. The records of these are in the form of tables, graphs. 



Date 



March 8 



9 



9 



io 



io 

 ii 

 ii 



12 

 12 



13 

 14 



14 



Time 



n:oo A.M. 

 io:oo A.M. 



5:00 P.M, 

 9:00 A.M. 

 6:00 P.M 

 9:30 A.M. 

 SlOO P.M 

 9:00 A.M 

 4:00 P.M 

 4:05 P.M, 

 9:45 A.M 

 4:30 P.M 

 9:00 A.M 

 3:00 P.M 



Hours 

 elapsed 



• • 



23 

 46 



55 

 78 



94 

 101 



101 



118 



125 

 142 



148 



75 



TABLE I 

 Barley 



Room 



Max 



I9?9C 



17-3 

 17.2 



17. 2 



17.2 



17. 1 



17. 1 

 17.2 



17.2 



17.2 



17. 1 



17.0 



17.0 

 17-0 



i7?2iC. 



17. 16 



17. 16 



17.16 



17. 21 



Min 



l6?22 C 



16.17 



16.17 



16.06 



16.39 



1905 



i7?ioC 

 17.20 



1730 



1750 

 17.80 



18.30 

 18.60 



19 



19 



19 

 20 



20 



20 



5° 

 20 



20 



62 



21 .40 

 21.40 



IQII 



i 7 ?ooC 

 17.10 



17-35 

 17-77 

 18.50 



19-44 

 20.20 



22.20 



22 

 22 

 22 



2: 

 21 

 21 



50 

 .00 



.25 



.00 



.40 

 •3° 



♦This and other discrepancies between room and maximum temperatures are due to (1) the poor 

 thermometer used to indicate the room temperature, and (2) the fact that the maximum temperatun 

 were calculated from a Weather Bureau pattern thermometer with Fahrenheit scale. 



f On the afternoon of March 12, the flasks were opened in order to determine whether any odor was 

 present. None was detected and the contents of the flasks were not disturbed in any way. ^ evert ™^ 

 less, the temperature in the flask containing 1911 seed fell steadily, from that time on, as the recora 

 shows. 



and photographs. Our records will show that, other things being 



time 



indicative of high germinating 



