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Esther Pearl Hensel 



*The flower which was open on the morning of January 24, 1905, was still open the 

 next morning at 11:30 A.M., but closed at 2:20 p.m. 



When the temperature is raised above the normal, closing 

 can be brought about earlier than usual, a fact shown by the 

 followinof table : 



Humidity in no way influences closing as evidenced by the 

 following : 



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