Excerpt from Lectures on the Applications of Chemistry and Geology to Agriculture
The First Part of the following Lectures was addressed to a Society of practical agriculturists, most of whom possessed no knowledge whatever of scientific Chemistry or Geology. They commence, therefore, with the discussion of those elementary principles which are necessary to a proper understanding of each branch of the subject. Every thing in such Lectures, which is not - or may not be - easily understood by those to whom they are addressed, is worse than useless. It has been my wish, therefore, to employ no scientific terms, and to refer to no philosophical principles, which I have not previously explained.
To many who may take up the latter portions of the work, some points may appear obscure or difficult to be fully understood; such persons will, I hope, do me the justice to begin at the beginning, and to blame the Author only when that which is necessary to the understanding of the later is not to be found in the earlier Lectures.
For the sake of clearness, I have, in the following pages, divided the subject into four Parts - the study of each preceding Part preparing the way for a complete understanding of those which follow.
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