12 Method of Training Vines under Glass, in a House. 



also very productive. By these means, the tree possesses 

 the double advantage of no part of it being robbed of its 

 nourishment, by means of any other vegetation, which is sup- 

 plied from the same root, being situated either in a higher 

 position, or warmer atmosphere. To what extent the former 

 of these circumstances alone may operate, I cannot deter- 

 mine, from any actual experiment; but, from the general 

 observations I have made, that the growth of the Vine, as 

 well as of other trees, is most luxuriant in the parts that are 

 situated highest, I am inclined to think, that its effects are 

 very considerable. Others, who have made the same obser- 

 vation, have recommended the training of the shoots in a 

 zig-zag manner, advancing upwards, with the view of retard- 

 ing the ascent of the sap through the inclined parts ; this, 

 however, I have found to have little or no effect, the general 

 direction of the shoot being upwards, through all the bend- 

 ings. But whatever may be the effect produced by the 

 horizontality of the position, in equalizing the luxuriance of 

 the growth, I conceive that no doubt will be entertained, in 

 regard to that of an uniformity of temperature ; and this is 

 fully obtained by the method in question. 



I now come to the other object to be attained by the 

 mode of treatment, which will be stated in a few words, as 

 the effects produced in regard to it, will be very evident. 

 In the usual mode of management, each tree is under the 

 influence, in its different parts, of all the degrees of temper- 

 ature in the house ; but under the mode now proposed, each 

 tree has its own peculiar climate, to which alone all its parts 

 are exposed. This affords us the command of a most conve- 

 nient variety, in regard to earliness in the ripening of fruit. 



