4 THE GRAPE. 
cially produced. However, this has little to do with us in 
the present subject, further than the understanding of the 
difference between our natives and the exotics, a here 
it would appear that the constitutional properties alone 
are sufficient to make a true natural division ; for, unless 
we are greatly mistaken, there has not been one variety 
of foreign origin, or yet a seedling, direct from the same 
source, which can be ¢rudy verified as withstanding the 
changes of our climate, with the same pertinacity as the 
natives. 
The exotic grape-vine is a native of, and flourishes the 
best in warm, even, and comparatively dry climates; its 
organization is such as to require a long, steady, and warm 
season to perfect its growth. Under favorable circum- 
stances, it pushes forth a vigorous development, and ab- 
sorbs alarge quantity of nutriment from the soil, if encour- 
aged to the full extent of its powers. The broad and 
ample foliage perspires and respires very freely. Hence 
it follows, that the atmosphere in which it is growing 
should be most particularly adapted to the various stages 
of growth. Practical experience shows this to be deci- 
dedly the case; for, when not attended to, the most inju- 
rious consequences follow. 
Heat is the cause by which the sap is set in motion in 
the spring, and when it is once excited, the action is grad- 
ually increased along with the rising temperature, until 
eventually the whole energies of the plant are brou 
on active play. Light and moisture, combined with 
growth to its fullest capacity. This being the ease, it is 
easy to see that in so vigorous a grower as the grape-vine 
‘= great amount of these three elements is required. This 
2B ee = pe erees 
