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which is fixed on the nave of the carriage-wheel, as in Plate X. Fig. 1. ff, fo that the axis of the feed-box revolves four times dur- ing every revolution of the wheels of the carriage.|

In the periphery of this wooden cylinder are excavated four lines of holes, fix in each line, asat##nnnn. A fecond line of excava- tions is made oppoñte to thefe on the other fide of the cylinder, and two other lines of excavations between thefe; fo that there are in all twenty-four excavations in the wooden part of this axis beneath the feed-box, which excavations receive the corn from the feed-ceils, as the axis revolves, and deliver it into the flues fhewn in Plate XI. Fig. 2. 0071, not unfimilar to the original defign of the ingenious Mr. Tull. s

The fize of thefe excavations in the wooden cylinder to receive the feed are an inch long, half an inch wide, and three eighths of an inch deep; which are too large for any feeds at prefent employed in large quantities except beans, but have a method to contraét them to any dimenfions required, by moving the tin cylinder over the wooden one, as explained below in Plate XI. Fig. 4.

Confiruëtion of the Tin-cylinder. Plate XI.

À Bat Fig. 4. reprefents a cylin@er of tin an inch longer within than the wooden cylinder on the iron axis at Fig. 3. and is of two inches diameter within, fo as exaétly to receive the wooden cylinder, which may flide about an inch backwards or forwards within it, CD are two fquare tin fockets fixed on the ends of the tin cylinder to fit on the fquare part of the iron axis, which pañles through the wooden cylinder at //, Fig. 3. on which they flide one inch backwards or forwards.|

The following dire@tions in making the holes in this tiu cylinder,

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