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Changes of Plants, and Animals 
& 
husbandry are better understood. But here, where the 
wildness of nature is constantly in view, the attention of 
our farmers being called to her operations, will produce 
conviction, sooner than elaborate discussion, or technical 
example. . 
In my endeavour to shew the necessity of changing 
crops, and the utility of also changing the locality of ani- 
mals (the former well known, in Europe, to be essential, 
and the latter thought to be so by many) I mentioned, 
in our first volume, a number of facts within my own 
knowledge, and procured testimony from very respec- 
table sources, corroborating those facts, as to changes 
in natural products of timber and plants, which are un- 
deniably proved. I have known them to be true, from 
my youth. I think them very strong indications of the 
absolute necessity of changes of products, in agricultu- 
ral operations. I also conceive, that great support is 
afforded to the opinion, that change of locality is neces- 
sary, to preserve domestic animals from deterioration, 
by the facts, in frequent proof, that when one race of wild 
animals migrates, or becomes extinct, a different race, 
or races (in obedience to a natural propensity to change) 
is, or are, found in the haunts of those precedently in 
the occupation of them. I had intended to have prose- 
cuted this inquiry, and to accumulate a multitude of 
facts on this subject ; and I may yet, ata time of leisure, 
perform my promise. Mean time, I hold it a duty Lowe 
to myself, to say, that I never have had the most distant 
idea of bringing into view these, or any other facts, to 
support’ hypothesis, or theory, of any kind. On the 
contrary, any candid reader will see, that I cautiously 
avoid all such vain and unnecessary speculations. My 
