The manures most advantageously applicable to the various sorts of soils, and the causes of their beneficial effect in each particular instance / By Richard Kirwan.

  • Richard Kirwan
Date:
1796
Catalogue details

Licence: Public Domain Mark

Credit: The manures most advantageously applicable to the various sorts of soils, and the causes of their beneficial effect in each particular instance / By Richard Kirwan. Source: Wellcome Collection.

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    C ] the free accefs of air has been prevented, but alio oi all putrid vegetable and animal bodies: hence it is found in vegetable and animal ma- nures that have undergone putrefa&ion, and is the true balls of their ameliorating pow- ers: if the water that paffes through a putrefy- ing dunghill be examined, it will be found of a brown colour; and if fubjefted to evapora- tion, the principal part of the refiduum will be found to conlift of coal-f. All foils fteeped in water communicate the fame colour to it in proportion to their fertility; and this water being evaporated, leaves alfb a coal, as Mr. Haflenfraz and Fourcroy atteft *. They alfo obferved, that fhavings of wood being left in a moift place for nine or ten months, began to receive the fermentative motion, and being then fpread on land, putrefied after feme time, and proved an excellent manure^. Coal, how- ever, cannot produce its beneficial effefts but in as much as it foluble in water. The means of rendering it foluble are not as yet well as- certained ; lieverthelefs, it is even now ufed as a manure, and with good effeft *. In truth, the fertilizing power of putrid animal and ve- getable