242 PROCEEDINGS OF THIRTY-THIRD FRUIT-GROWERS ? CONVENTION. 



3. To ascertain which varieties are best adapted to the different 

 localities and for the different purposes. 



4. To afford opportunity for testing all classes of grapes with refer- 

 ence to their resistance to diseases which have been doing such serious 

 injury to the vineyards, and if found necessary to undertake the crea- 

 tion of an entirely new class of grapes to resist them. 



Your attention is here called to the fact that these experimental 

 vineyards happen to be so located that there is not a grape-grower in 

 the entire State farther than a day's journey from some one or more of 

 them, and a cordial invitation is extended to all to visit them and 

 profit by them individually. We are especially anxious to have you 

 see them and tell us what you think of the investigations conducted in 

 them and give us your ideas, suggestions, and criticisms. This will 

 encourage us and spur us on to greater effort. Special pains have 

 been taken to have the names conspicuously placed on each variety so 

 as to enable any one visiting the vineyards to see and study the varie- 

 ties, and we will also be happy to have you write to us for any addi- 

 tional information you desire. 



In these vineyards over three hundred varieties of resistants and 

 direct producers and over four hundred Vinifera varieties grafted on 

 resistant stocks and growing on their own roots are to be found, and to 

 this already large collection of varieties additional varieties are con- 

 stantly being added. We have just completed over eight hundred acid 

 and saccharine tests of Vinifera varieties fruiting on resistant stocks 

 in the department experimental vineyards. These tests were largely 

 made as a back check on our congeniality studies, and are bringing out 

 a great many interesting facts. They indicate, for instance, that the 

 same Vinifera varieties grafted on different resistant stocks may be 

 much sweeter on one, may have relatively more acid on another, ripen 

 earlier on some than on others, be more productive on one stock than 

 on others, etc.; in fact, often are entire successes on one variety and 

 failures on another. They show the important fact that in order to 

 successfully establish a vineyard on resistant stocks, while it is impera- 

 tive that stocks be selected that are suited to soil and climatic condi- 

 tions, it is not less important that stocks be selected also with reference 

 to their congeniality to the varieties it is desired to graft on them. 

 They indicate the important fact that some of the commercially well- 

 known varieties which are now being so largely planted for diverse pur- 

 poses, although they are on resistant-stocks, are likely not to prove success- 

 ful, because the stocks they are on are not congenial to them, even though 

 such stocks may be well suited to the soil conditions into which they 

 are to be placed. Therefore, there are at least three questions that 

 every intelligent grape-grower should ask himself and have answered 

 before planting: 



