64 



THE POLLINATION OF PEAR FLOWERS. 



of the six different kinds of Bartlett fruits are represented by the 

 shaded blocks on a scale of one-fiftietli of an inch per gram. The 

 open squares underneath represent the average weights of sound 

 seeds from the same fruits on a scale of one thirty-second of an inch 

 per one-hundredth gram. 



BARTLETT. ' 



Averaae weight. 

 Giams. 



FRUITS 100.40 

 SEEDS 0.07 



FRUITS 116.1 

 SEEDS 0,38 



FRUITS 167.7 

 SEEDS 0.38 



FRUITS 133.6 

 SEEDS 0.30. 



FRUITS 89.4 

 SEEDS 0.27. 



FRUITS 114.2 

 SEEDS 0.32_ 



X SELF. 



X ANJOU. 



X EASTER. 



□ 



X ANGOULEME. 



X WHITE DOYENNE. 



X CLAPPS FAVORITE. 



Fig. 5.— Diiigraiu showing the ditiVrenees in iVuit.s and seed.s of the vaiious kinds of Bartlett pears. 



Tlie above figure shows the difference in average weights of the 

 different kinds of fruits and of the seeds from those fruits, the latter 

 on a much larger scale. Anjou and White Doyenne seem to be better 

 seed producers proportionally than they are fruit i>roducers. Easter 

 and Clapps Favorite, on the other hand, excel in development of fruit. 

 For further study of the individual differences the reader is referred to 

 the tables and to Plates i-vi and xi. 



We will now compare the self-pollinated Bai tletts with the crosses. 

 We find the self-pollinated fruits remarkably uniform among themselves, 

 yet differing decidedly from the crosses. Plates i-vi will show this 

 difference in shape much better than any description. The self-polli- 

 nated fruits are narroAver, with less taper toward the stem, and with 

 the swelling toward the blossom end less pronounced. The surface is 

 smooth and regular, more like an Anjou or Boussock, and without the 

 characteristic bumpy api)earance of the Bartlett. Mr. Taylor, of the 

 Division of Pomology, states that thet^e would not be regarded as typical 

 Bartletts. The color, characteristic texture, and appearance of the skiG 



