I 



CULTURE. 199 



No. 17. V. Berlandieri, V. Monticola (?), Riparia X 

 Berlandieri, Riparia X Monticola, Rupestris 

 X Berlandieri. 

 No. 16. Rupestris du Lot, Rupestris de Lezignan, 



Cinerea, Rupestris, Riparia X &stivalis. 

 No. 15. V. Cinerea, V. JEstivalis, V. Candicans. 

 No. 14. Vialla, Solonis, Novo-Mexicana, Noah. 

 No. 13. Taylor, Michigan. 

 No. 12. Jacquez, Herbemont. 

 No. ii. York-Madeira. 

 No. 10. Elvira. 



Numbers below 10. Othello, Autuchon, Concord, V. 

 Labrusca, Senasqua, Black Defiance, Croton. 

 Duchess, etc. 



The numbers 16 to 20 correspond to a sufficient resistance 

 for all soils; the numbers 14 and 15 express a resistance 

 sufficient for sandy and damp soils, where the phylloxera 

 does little harm ; No. 13, and under, should be totally discarded 

 from vineyards. 



However, there are cases where the choice of a -vine cannot 

 be altogether subordinated to its resistance to phylloxera. 

 We have already mentioned, in the first part of this work, 

 the example of the Cornucopia and Solonis, and could add 

 several others. 



For sandy and damp soils, where the phylloxera multi- 

 plies but little, vines of medium resistance, but well 

 adapted to these soils, should be preferred to other more 

 resistant cepages, which would not develop as well. 



In the choice of a variety numerous circumstances, which 

 are of influence on the growth, must be taken into account. 



These circumstances have been studied at length in the 

 first and second parts of this work. Here we will only 

 recapitulate the general points, and indicate, for each of them 

 separately, the comportment of the American vines. It 

 goes without saying that in each circumstance these in- 

 fluences operate in varying proportions; the growth of 

 American -vines is, therefore, determined by their combined 

 influence ; on this the choice of a vine depends. 



Several American -vines of only slight resistance grow 

 well, for example, in dry soils ; but frequently phylloxera 

 has a very intense action, and they have to be excluded from 

 these soils. Others have a very fine growth in a given soil, 

 but for some reason or other they do not set properly, and, 



