LIST OF ILLUSTRATIONS. 



Plates. Page. 



I. Bartlett pears self-pollinated 88 



II. Bartlett i^ears self-polliuated 90 



III. Bartlett pears crossed with Anjoii 92 



IV. Bartlett pears crossed with Easter 94 



V. Bartlett pears crossed by insects 96 



VI. Bartlett pears self and cross-pollinated 98 



VII. Buflum pears self and cross-pollinated 100 



VIII. Biiffum pears self and cross-pollinated 102 



IX. Angonleme pears self and cross-pollinated 104 



X. Anj on pears self and cross-pollinated 106 



XI. Seeds from self and cross-pollinated Bartlett pears 108 



XII. Seeds from self and cross-pollinated Bulfiim pears 110 



FlGUEES. 



1 . Enlarged section of a Bartlett pear flower. 14 



2. EloNver of the Bartlett pear (natural size) 25 



3. Bud of the Bartlett pear, with its petals removed, showing the incurved 



stamens (natural size) 25 



4. An emasculated bud of the Bartlett pear, showing only the hve pistils (nat- 



ural size) 25 



5. Diagram showing the dift'erences in fruits and seeds of the various kinds of 



Bartlett x^ears 64 



6 



