8 ESSENTIALS OF BOTANY 
series is merely suggested, — other values may be found more con- 
venient. Note the rate of germination in each place and record in 
tabular form as follows. 
No. of seeds sprouted in 24 hrs. 48 hrs. 72 hrs. 96hrs. etc. 
At 82°, a ee 
At 50°, —— re 
At 70°, a fe. a ee, 
At 90°1 ss. Hee ees ce 
7. Moisture. — What was said in the preceding section 
in regard to temperature applies also to the question of 
the best conditions for germination as regards the supply 
ee 
Fie. 3. Soaked Peas in Stoppered Bottle, ready for 
Exhaustion of Air. 
of moisture. The soil in which seeds grow out of doors 
is always moist; most kinds germinate best in earth not 
nearly saturated with moisture. 
8. Relation of the Air Supply to Germination.— If we 
wish to see how soaked seeds will behave with hardly any 
air supply, it is necessary to place them in a bottle arranged 
1 For the exact regulation of the temperatures a thermostat (see Appendix II) 
is desirable. If one is available, a maximum temperature of 100° or over 
should be tried. : 
