— 40— 



15- Onion, CAant Yellow Globe Rocca. — Department of Agri- 

 culture. 



50 seeds of each number sown )i inch deep in sand, in 5 -inch seed pans. 

 No. I, placed in incubator. 

 No, 2, in forcing-house. 

 No. 3, in cellar. 



SOWN APR. 23 



* The door was open and the sun shone in in the afternoon. 



t Average for the first thirteen days, 49°. There was no sign of germina- 

 tion in the cellar until circumstances demanded the admission of air and 

 sunlight for the good of other things in the cellar. 



Epitome. — There were 110 important differences in rapidity of 

 sprouting between the sample under constant temperature and that 

 under high variable temperatures, but the seeds in the cellar, in 

 which the mean temperature was 19° and 21° lower than in the 

 other cases, were about twelve da3^s behind. Percentages of 

 sprouting decreased with the decrea.se of the mean temperature, 

 though not proportionately. 



CONCLUSIONS From the Foregoing Tests, upon the Influences of 

 Constant and Variable Temperatures upon the Sprouting of Seeds. 



1. Different results are obtained from the same sample of seeds 

 under different variations of temperature, of which the daily mean 

 is cssentiall}^ the same. 



2. Sprouting takes place more quickly under essentially con- 

 stant temperature of about 74° than under a temperature ordina- 

 rily variable, which gives about the same mean. 



3. Rapidity of sprouting is particularly marked in beans and 

 peas. 



4. As the mean temperature becomes lower, rapidity of ."sprout- 

 ing becomes slower. 



