252 



Bulletin 231. 



be ripe in about four weeks' time; and these same plants among 

 others were cleared of the immature fruits, taken to the warm house, 

 plunged in soil that registered from seventy-five to eighty degrees, 

 and in the required time were ripening from three to five fair sized 

 berries to each plant. The experiment demonstrates that a cool 

 temperature can be employed to retard strawberries, but compara- 



t- 



.V 



^^^- ^"t ^^^--^^-o^-c 



Fig. 6. — Influence of temperature in forcing. 



tively high temperature is necessary to a regular normal develop- 

 ment. 



List of Varieties Tested for Forcing. 



Those marked with a double asterisk are the varieties considered 

 the most profitable for forcing. Those with a single asterisk have a 

 secondary value, and those without an asterisk are, in our experience, 

 not suitable for forcing: 



