4 THE Commertial and A'gricultural Magazine.

o. XXXII.] MARCH 1802.[NoN

DESCRIPTION OF Mr. GEORGE QUAY LE’s PEN- TROUGH FOR A WATER CORN MILL;

WIA A PLATE,

To the Editor of the Gommercial and Agricultural Magazine. SIR, Ifle of Man, March 7» 1802. AVING had occaſion to repair a Water Corn Mill, the

machinery and floor of which had been deſtroyed by means of leakage from the pen-trough and dam; I was induced to turn my attention to the moſt effedual means of preventing the recurrence of the ſame evil. In the expedients I adopted, there is nothing new in principle, but in the combination of them IL believe there is. As the miſchief they are inten ded to prevent is frequent, and as the making public the mode eIlh A PLA may furniíh hints for the improvement of othe n cloſed you a ſhort ſtatement of it, which you aré at es to lay before the BEE:

The work was begun by removing as much of the ſoil be- tween the mill and the dam, and as Tow as the rock on which the foundation of the mill ſtood, as allowed room for building a Wall, leaving a vacancy through which a man could paſs betwee them. The face of the wall, on the dam ſide, was LELE IER lar, but with an angle of one foot in ten on the outſide, to en- able it to ſuſtain the lateral preſſure. By this means all leakage from the dam to the mill was entirely cht of, and that from the pen-trough was alſo prevented from doing injury, by carrying the ſide walls, containing the water wheels as high as the ſecond floor of n ini and about three feet above the top of the ciſtern.

The plan will ſhew the mode of laying the water on the wheels.® By having an outer ſhuttle to the pen--trough, every advantage of keeping. the water at as great a height in the mill dam as the ſituation will admit, is retained without the ex Pence| and inconvenience of being obliged to provide a pen-trough equal in height to the water 8 in the reſervoir. In a deep j pen-trouch the water finds more crevices and ſooner’rots ic. Î The expence of conſtructing it is alſo greater, as it muſt be made proportionately ſtronger to ſupport ſo much additional weighc.

My pen-trough tolts much leſs money, and anſwers the pur- poſe equally well as a deeper one.

The water in my pen-trough being carried paſt IRE centre of

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the water wheel, and rétürned. back upon it, cauſes t

Com.& Ag. Mag. Vol. VI. Y

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