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municating at the further end with an iron one whichenters the furnace : for regulating the blast, a small holeis made in some convenient part of the pipe, which isstopt with a pin, or opened, according as the blast is re-quired more or less strong. The hole in the lower part ofthe tub, by which the waste water pastes out, is about fiveinches square ; and one side of the pit, where the waterruns off, is a little lower than the surface of the stone, sothat the water can never rise high enough in the tub tocover the stone ; though it is supposed to continue alwaysa considerable height above the top of the hole.

Though this machine is said in the Transactions to besufficient for the smelting of harder ore than any in Lead-hills where it was erected, I have been informed by aperson concerned in those works, that it has since beenfound not to answer so well as could be wished, and thataccordingly it has been laid aside, and its place suppliedby the common bellows.

In Dauphiny in France.

The blowing machines used in Dauphiny for the forgesand smelting furnaces have a great resemblance in theirgeneral structure to the foregoing. They are described bySwedenborg in the second volume of his regnum subter-ranean, but with little exactness : a more accurate de-scription and figures of them, taken from the papers leftby Reaumur, are inserted in the art des forges & fourneauxd j er, published last year by the direction of the Frenchacademy.

The upright pipe is generally between twenty-fiveand twenty-six feet high : it is composed of two piecesof fir, hollowed, and joined together by iron work. In-stead of a distinct reservoir or funnel on the top, a part

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