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§ OF INCLOSURES

fiderable thicknefs, with a ditch on each fide; the heart of the dike being made up with the earth that has been taken from the ditches, and only a thin facing on each fide,-is built of folid fea/ from top to bottom; the confequence of which is, that as the loofe earth that is thrown into the middle of the dike fubfides much more than the feal on each fide, the top of the dike finks, and of courfe the two fide-walls are preffed too much upon the infide, fo as to d/ge({well) out about the middle, and quickly crumble down to duft. To avoid this inconvenience, I have always chofen to build my dikes of this fort much thinner than ufual, they being only three feet and a half or four feet thick at the bottom, fifteen or eighteen inches at top, and five feet high, taking care to have them built in fuch a manner as that every fod(feal) from top'to bot- tom binds the joinings of the others be- low it, with as much accuracy as the bricks in a well-built wall; as will appear by examining and comparing together

( Fig.