Scientific Aspects of I^uther Burbank V Work 



the time of its beginning. An interesting feature 

 of Mr. Burbank' s brief account, in his 'New Cre- 

 ations' catalogue of 1894, of the berry experimen- 

 tation, is a reproduction of a photograph showing 

 *'a sample pile of brush 12 ft. wide, 14 ft. high, 

 and 22 ft. long, containing 65,000 two and three- 

 year-old seedling berry bushes (40,000 blackberry 

 X raspberry hybrids and 25,000 Shaffer X Gregg 

 hybrids) all dug up with their crop of ripening 

 berries." The photograph is introduced to give 

 the reader some idea of the work necessary to pro- 

 duce a satisfactory new race of berries, ''Of the 

 40,000 blackberry X raspberry hybrids of this kind 

 'Phenomenal' is the only one now in existence. 

 From the other 25,000 hybrids, two dozen bushes 

 were reserved for further trial." 



An astonishing result of the hybridization 

 between the black walnut, Juglans nigra, used as the 

 pistillate parent, and the California walnut, /. 

 calijornica^ staminate parent, are walnut trees which 

 grow with such an amazing vigor and rapidity 

 that they increase in size at least twice as fast as the 



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