
          250

2.  "That the 'late failure in our peach orchards has
been more owing to causes arising from the natural termination
of the duration of the sorts so long propagated, than from
any extraordinary malignancy of disease'. "

Objections.--"There are numerous orchards or at least 
gardens, in various parts of the country, stocked with superanuated [superannuated]
sorts, which have never been affected by the 'yellows'.
If his theory were correct [Mr. Wilson's], the disease <s>was</s> would be
confined exclusively to those sorts of trees which have passed
their natural term of duration, while the new and renovated
sorts would escape its ravages.  Such, however, is well
known not to be the fact.  All sorts, new and old, either
in stock or graft, are indiscriminately affected, whereever [wherever]
the disease prevails."  [He cites many specific instances
from his own orchard where in 1828-9-30 new varieties succumbed,
also old sorts in his orchard as Early Ann, Lemon
Cling, Yellow Rareripe, Red Rareripe yet unaffected.

"There is one fact that seems conclusive against Mr.
Wilson's theory, it is, that the 'yellows' has never appeared
in Europe, where, if anywhere, various sorts of peaches have
been propagated beyond the natural term of their duration.

"I will add further, that the 'yellows' is attended with
a set of phenomena altogether peculiar, and totally different
        