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Mr. Burbank at Work

Mr. Burbank is here selecting among boxes of second-generation thornless blackberry hybrids. Some of these specimens are a cross between the thornless blackberry and the white blackberry; others between the thornless and the Himalaya blackberry. Through these experiments Mr. Burbank hopes to rid all of our best varieties of blackberries of their thorns.

Mr. Burbank at Work

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 6 Chapter 1