Plate I. 



Bartlett pears developed from emasculated flowers hand-pollinated with Bartlett 

 pollen from the same tree. These and the following half-tone ligures are natural 

 size from i)hotographs. The numbers are the original record numbers, referring 

 back to the pollination experiment. For photograph of seeds of No. 3885 see PI. 

 XI. Descriptions of both fruits and seeds will be found on p. 60. 

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