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to find hardy stocks for varieties of the former as for hybrids 

 between Vinifera and so-called Anaheim-disease-resistant vines, 

 as long as grafting has to be done. 



The difficulty in hybridization is, that, although resistance to 

 the Phylloxera, growth habit, form of root-system and size of 

 roots are variable qualities with the grape vine, these have be- 

 come so firmly established in their respective degrees and tied 

 to one another with the different American species through 

 selection by nature under the combined influence of the Anaheim 

 disease, Phylloxera and climatic and soil conditions of the particular 

 locality where each occurs, that they have become extremely fixed 

 and persistent. As the work of French experimenters has proven, 

 it is extremely difficult to separate them and combine again, each 

 in the proper degree. If one quality changes, the other qualities 

 change cprrespondingly. Still we have enough examples on hand 

 to convince us that this can be done. As long as we have not 

 found a way of giving medicine to the grape vine internally with 

 good effect, prevention of the disease will be possible only in the 

 manner as has been the object of the writer to explain in the 

 above treatise. 



Press of "Sentinel," Santa Cruz, Cal, 



