DEDPEATION.

To Sir JoHx SiNcraiR, Baronet, to whofe unre- mitted exertions, when Prefident of the Board of Agriculture, many important improvements in the cultivation of the earth were accomplifhed and re- corded; this Work, which was began by the inftiga- tion of his letters to the author, is dedicated with

great refpect.

Derby, Jan. 1, 1790.

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