54 PISTILS AND STAMENS 
by crossing with some varieties than with others. (Fig. 59.) In 
case of Sweet Cherries, when flowers of the Bing, a variety requir- 
ing cross-pollination, were pollinated with pollen from the variety 
called the Knight, only a few fruits developed; while flowers 
pollinated with pollen from the Black Republican produced 
fruit abundantly. Obviously much of the success in orcharding 
has to do with securing for each variety of fruits the best kind of 
pollination. 
