more imperfeft, or requiring more time and pains to feparate thecohering clots. The labour of lifting is fomewhat facilitated bycutting the mafs in perpendicular feftions, at (hort diftances, with affiarp fpade; and the additional trouble of lifting and fpreading,which dung in this condition occafions, is nothing compared to thevaft advantage of having almoft the whole preferred a foluble mafs,by conftant maceration ih putrid water, inftead of diffipating a greatproportion in the air, and rendering a part of the remainder refrac-tory by a rapid fermentation.
Town dung, as has been already obferved, differs only from farmdung, as containing a greater proportion of diffoived or very folubleanimal matter, and earthy fubftances. Having, in the laft article,difeuffed, at great length, the management of undecompofed pu-trefcible matters, it will not be neceffary to add any tiling here onthat fubjeft. Belides, this fubftance does not come under the ma-nagement of the hufbandman, who mull take it as he finds it. Norcan the citizen pay greater regard to it, who throws all offals afide,and thinks only of the price they will bring. The fubftance is va-luable to the hufbandman, however, not only on its own account,but alfo on account of its greater putridity, facilitating the putre-faction of others with which it may be mixed. See Aphorism ad.The puirid liquids of the city would be no lefs valuable, could anyfyftem be eflablifiied to fpread them over the furface of the coun-try as manure. The former cefs pools of Quaker Miller, and themore recent irrigations over the links of the Forth, near Leith, bywhich the fertilizing fediment from Edinburgh is made to raife aluxuriant vegetation on grounds formerly barren, is an example ofwhat this enriching liquid might effeft. There are few inftanees,indeed, where it can be applied with fuch advantage as this; but ifmeans were ufed to coiled and concentrate it a little, it might be car-ried in veflels forfome miles, and, from its enriching quality, be foundprofitable, either to be fprinkled on the ground, or poured on ab-forbent fubftances. Much of this liquid is abforbed by afhes andother earthy parts of this compofite, where it is fafeiy lodged withlittle danger of being carried off by expofure to the weather, as theearths ftrongly retain the effence of organized folutiona. Aphorism6th. For this reafon, this compofite fuffers lefs than farm dung bybeing carried to the field, and laid in heaps in the open air: and juftfo much lefs as the proportion of earthy fubftances contained in themafs is greater.
2 . The more complex compofitions of calcareous or organizedmatter with other fubftances.
All thefe are known, in rural language, by the general name ofcampolls. They are either made up of lime mixed with fome fub-ftance on which it is fuppofed to aft ; or the compofite fubftance ofwhich we have been treating tinder the name of dung ufed for a fi-rnilar purpofe ; or both lime and dung made up with other mattersin the fame heao,