SOME EXPERIMENTS OF LUTHER BURBANK. 223 





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Ten Varieties of Plums grown from the Seed of the Buhbank 1'lum crossed with the 



Apricot Plum, showing Variations. 



japonica and C. americana) , the trees, leaves, growth and nuts are mid- 

 way ; second generation and later generations as usual show more varied 

 combinations and variations. To breed the burrs off from chestnuts 

 is dangerous, because it allows the birds to get in at the nuts. The 



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Bed of Seedlings from Spineless Cactus, showing here and there Reversion to the 



Original Spine Form. 



