"The close observers of vegetable nature have remarked, that when a new graft is taken from an aged tree, it possesses indeed in exterior form the appearance of a youthful shoot, but has in fact attained to the same state of maturity, or even decay, which has been reached by the parent stem. Hence, it is said, arises the general decline and death that about the same season is often observed to spread itself through individual trees of some particular species, all of which, deriving their vital powers from the parent stock, are therefore incapable of protracting their existence longer than it does."