Men have written wisely and usefully, in illustration and aid of Agriculture, from the platform of pure science. Acquainted with the laws of vegetable growth and life, they so expounded and elucidated those laws that farmers apprehended and profitably obeyed them. Others have written, to equally good purpose, who knew little of science, but were adepts in practical agriculture, according to the maxims and usages of those who have successfully followed and dignified the farmer's calling. I rank with neither of these honored classes. My practical knowledge of agriculture is meager, and mainly acquired in a childhood long bygone; while, of science, I have but a smattering, if even that. They are right, therefore, who urge that my qualifications for writing on agriculture are slender indeed.