460 BOTANICAL GAZETTE [JUNE 
dominates, hence the time required for the germination of these 
seeds was prolonged. After germination began, the growth of 
roots and leaves was retarded by the ether in all of the seed- 
lings. 
TABLES I-IV. SEEDS. 
Seeds soaked 24 hours in pure water, then placed in damp chamber. Temp. 18° C, 
I. Zea Mais. 
;, |Number of hours/Total number of Average final|Average final 
Cc of eth F r t f 
pit sahs-mal * a for ger- pase urs in cham- ‘elon a ini of roots Peep of shoots 
re) 48 168 go 35 14 
I 36 168 85 20 10 
2.5 48 144 75 12 8 
5 138 60 8 5 
10 no germinat’n 336 fo) fo) f°) 
II. Avena sativa 
fc) 48 168 95 20 12 
I 36 168 85 17 9 
; 5 96 144 bi : 5 
144 fe) 3 
Io Ino germinat’n| 336 (e) fe) ) 
III. Phaseolus vulgaris 
Ce) 40 168 100 18 
I 24 168 100 15 
2.5 68 144 95 8 
5 96 144 85 6 
10 no g t’ 330 ) ° 
IV. Cucurbita Pepo. 
fc) 36 168 95 18 
I 24 168 95 17 
2.5 60 144 100 15 
5 84 144 50 10 
be) no germinat’n 336 fe) te) 
pee ie eee 
When the seeds were placed in an atmosphere containing 5” 
of ether, germination was still more strongly retarded ; although, 
as in the preceding case, the effect was greater upon some seeds 
than upon others. Germination of corn was retarded 48 hours, 
while oats did not germinate until 144 hours after they were 
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