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these improve the texture, and the former sup-ply also the carbonaceous ingredient.

Before I advance farther, to prevent super-fluous repetition, I shall lay down a second ge-neral maxim; which is, That dung is a properingredient in the appropriated manures of allsorts of soils, as it supplies the carbonaceousprinciple.

OF CLAYEY LOAM.

This soil is defective either in the calcareousingredient, or in the sandy, or in both: if inthe first, the proper manure is chalk*: if inthe second, sand; if in both, silicious marl orlimestone-gravel, or effete lime and sand.

The quantity of chalk that should be em-ployed, considered abstractedly, should be di-rectly proportional to the defect of calcareousmatter; but as such a quantity cannot be ad-ded without diminishing the proportion of oneof the other ingredients, a much smaller quan-tity must be employed, or else a substance

* 1st Young’s Eastern Tour, 395.