Mr. Burbank at Work 



Mr, Burbank is here selecting among boxes of second-gen- 

 eration ihornless blackberry hybrids. Some of these speci- 

 mens are a cross between :h'. thornless blackberry and the white 

 blackberry; others betwien the thornless and the Himalaya 

 blackberry. Through these experiments Mr. Buriank 

 hopes to rid all of our best varieties of black- 

 berries of their thorns. 



