294 FIELD, FOREST AND FARM 



the soil is injected with an asphyxiating fluid called 

 sulphur of carbon, the fumes of which instantly kill 

 all insects that they reach. The difficulty is to do a 

 thorough job and leave no survivors. A third de- 

 vice is employed by those who import from America 

 certain wild vines much hardier than our cultivated 

 ones, but producing inferior fruit. These American 

 plants resist the attacks of the phylloxera, and con- 

 tinue to flourish where our vines would succumb. 

 On these wild stocks, as soon as they are well rooted, 

 are grafted our native vines, and thus is obtained 

 a grape-vine of two-fold quality, resisting by the 

 hardy nature of its root the phylloxera's assaults, 

 and bearing, on its engrafted shoots, the incompar- 

 able fruit of our old vineyards." 



