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At St. Pierre in Languedoc.

Mr. Barthes, in a curious paper printed in the thirdvolume of the memoirs of the correspondents of the Frenchacademy, gives a minute description, though in someparts not so clear as could be wished, of a blowing ma-chine at the forge of St. Pierre on the river Obriou,which he looks upon as one of the most perfect of theinstruments of this kind. Its general structure is nearlythe fame with that of Foix, but the height of water abovethe choak much less.

The upright pipe is square, about nine feet high, andsomewhat more than seven inches wide. Into its top areinserted, at opposite sides, two pyramidal air pipes,widening upwards, and passing up obliquely through abason of water four feet high. The space included be-tween the pipes, at their lower end, under the bason, isa kind of hopper, into which the water enters throughtwo apertures in the bottom of the bason : to each ofthese apertures is fitted a piston or stopper, hung to theend of a lever, by which it is raised more or less, accord-ing as more or less water is required. Two of these in-struments are furnished with water from one bason ; andthe lower ends of both enter into one air vessel, whichis near five feet high, about six and a half long, nearthree and a half wide at one end, and not quite twoat the other. The stones, for the water to fall upon, aresomewhat less than four inches and a half distant fromthe pipes : the water runs off through two rectangularapertures at the bottom, each about eight inches and ahalf wide, and near six inches high : the pipe whichcarries off the air, is an inch and a quarter in diameter atthe small end where it enters the furnace.

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