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. 96 hrs. etc. 



At 32°, 



At 60°, 



At 70°, 



At 90°,i 



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 



--.^ t 



Fig. 3. Soaked Peas in Stoppered Bottle, ready for 

 Exhaustion of Ah-. 



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 



' 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. 



