1801.] On an Unufual Manure. 149

H, a broad parallel to the bottom of the bolter, and forming part of the ſlider A. The uſe of this board is to prevent any of the ſifted matter from falling into the other diviſion.

I, repreſents two of the back-feet on which the bolter ſtands,

Fig, 3. ſhows the top or upper part of the lid of the bolter.

K, the ſlider which moves the lengthway of the bolter.

LL; handles which work the flider.

M; 2 ſcrew holding the fork which gives motion to the ſieve,

Eig. 4. the forked irons ſhown ſeparate from the lid,

ON AN UNUSUAL MANURE. For the Commercial and. Agricultural Magazine.

HE properties and ſpecific uſes of a great variety of ma, nures have already been judiciouſly ſtated in your Maga- Zine, but the ſubje& is by no means as yet exhauſted, and indeed, âppeéars to me to be almoſt inexhauſtible. I have ſcen improve=- ments of ſuch magnitude effeéded‘by the common application of manure, eſpecially on convertible land, and where it has been ſpread upon green-ſward, for at leaſt ſix months before the plow- 1ng, that I ſhould think myſelf juſtified if I were to aſfert that a great part of the myſtery and art of farming depends upon the

poſleſſion and good management of this ſingle article.

By manure,[ mean any ſubſtance that is found encouraging to land; almoft any ſubſtance that is of a quality differing ma- tèrially wih the ſoil on which it is uſed; for the greater that difference, the greater, in general, the improvement made in the land. There is indeed ſcarcely any ſituation, in this ifland,, that has not its native,‘appropriate,* and cheap manure, which. might be uſed to 2a greater extent than we at preſent ſee it, and. would, no doubt, be far more extenſively made uſe of, if. the ſhortneſs, or want‘of leaſes. did’ not preſent inſurmountable obſtacles. Grant only lons leaſes, and you would ſoon ſee even the common rack-rentét turning his newly acquired capital to good account both to Ñimſelt and to the public: you would ſoon ſee him engaging in extenſive modes of manucing, fuch as marling, chalking, Timing, and likewiſe, in certain ſituations, in flbating and warping, at his own expence,

The- manure, however, that I wiſh at preſent. to introduce to the notice of your readers, is called Sea-Sludge, which, although it is the moſt enriching and durable of manures, has Not, I believe, been recommended in any treatiſe on this ſubje. It is. not: indeed a general. manure, or attainable in every ſitua- tipn, but might be uſed. much oftener and to a greater extent than it is at preſent, It is to: be found upon. the lower pärt of every falt-marſh, that part which is generally: overflowed by the tide, but not with ſuch conſtancy as to prevent its becoming firm, and its being covered with a thin coat of graſs, I have ſeenthis ſurface ſoil of a ſalt-marſh dug out in ſquare lugps, a

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