344 BOTANICAL GAZETTE [DECEMBER 
at which the germination test was made increased from 17.5° to 
28°C. The percentage of germination was 14 per cent less in the 
icebox than at 17.5°C., but greater than at any temperature 
warmer than 17.5°C. No record was kept of the temperature 
: < 
40 
Fic. 2.—Germination of one lot of larkspur seeds 
in the icebox, but it was probably cooler than in 1914, when each 
of the three samples tested showed a higher percentage of germina- 
tion in the icebox than at 17.5° C. 
TEMPERATURE REQUIREMENTS FOR GERMINATION OF POPPY 
SEED.—One lot of poppy seeds used in the investigations in 1912 
was of the opium poppy, Papaver somniferum, the other two lots 
TE/IPERATURE 7 | 
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