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THE DRILL PLOUGH. 



60 1 



Plate X 



which is fixed on the nave of the carriage-wheel, as m^ 

 Fig. I. //, fo that the axis of the feed -box revolves four times d 

 in a every revolution of the wheels of the carriage. 

 In the periphery of this wooden cylinder are excavated four li 



f holes, fix in each 



as at nnnnn n. 



A fecond line of 



..uo . made oppofite 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 excavationsin the wooden part of this axis beneath the 

 feed-box, which excavations receive the corn from the feed -''^ 



as 



the axis revolves, 



d deliver it into th 



fl 



{he 



Plate XI 



Fiff. 2. ^orL not unfimilar to the original defien of 



t> 



tH 



O 



Mr. Tull 



The {ize of thefe excavations in the wooden cylinder 



feed are an inch long, 



half an inch wide, and three eighths of 



inch deep ; which are too large for any feeds at prefent employed 

 large quantities except beans, but have a method to contraft them 

 any dimenfions required, by movingthe tin cylinder over the wood 

 one, as explained below in Plate XL Fig. 4, 



OX 



.n 



bar 



in 



the 



licb 



e 



ConJlruSthn of the 'fin-cylinder. 



Plate XI 



A B at Fig. 4. reprcfents a cylinder of tin an inch longer with 

 than the wooden cylinder on the iron axis at Fig. 3 



of two 



y 



O 



the wooden cylinder, 



n it. C D 



inches diameter within, fo as exadly to recen 



which may Hide about an inch backwards or forwards with 



are two fquare tin fockets fixed on the ends of the tin cylinder to fit 



on the fquare part of the iron axis, which paffes through the wooden 



cyhnder at //, Fig. 3. on which they Aide one inch backwards or 



forwards. 



The following diredions in making the holes in this tin cylinder 



i. 



4H 



d 



fl 



