Book IV. 



DRILL MACHINES. 



387 



of drilling, are nothing, when compared witli tliose which arise from the use of the horse- 

 hoe ; with which from eight to ten acres of land may be hoed in one day, with one man, 

 a boy, and one horse, at a trifling expense, in a style far superior, and more effectual, 

 than any hand-hoeing whatever ; also at times and seasons when it is impossible for the 

 hand-hoe to be used at all. 



2553. The N'orfolk drill or improved lever drill [Jig. 313. ^ is a corn drill on a larger 

 scale than Cooke's, as it sows a breadth of nine feet at once : it is chiefly used in the light 



soils of Norfolk and Suffolk as being more expeditious than Cooke's, but it also costs 

 about double the sum. 



2554. Cooke s three roiv corn drill is the large machine in a diminutive form, and is ex- 

 ceedingly convenient for small de- C 

 mesne farms where great neatness 

 is attended to. It can be used as 

 a cultivator, hoe, rake, &c. like the 

 other. 



2555. Of fwrni;) (Zrt//5. the best, 

 when this root is cultivated on a 

 large scale, is the improved Nor- 

 thumberland drill (/jg. 314.). The 

 roller (a) which goes before the 

 seed has two concavities, and thus i 

 leaves the two ridges in the very best j 

 form for the seed (2473.); after] 

 these are sown, two light rollers \ 

 (b, b) follow and cover them. It is 

 drawn by one horse, sows two rows 

 at once, and seldom goes out of I 

 repair. ' 



2556. Frenclts turnip drill (Jig. 

 315.) is the most perfect implement 

 of the kind. French was a Nor- 

 thumberland mechanist, and in- 

 vented the concavities in the tur- 

 nip rollers (2473.); soon after 

 which he died, and it was some- 

 time before his invention attracted 

 notice. Concave rollers, however, and curved coulters may be considered as two of the 

 greatest improvements that have been made in the machines used in turnip culture since 

 that root was first cultivated in drills. Besides the improvement of the concave rollers, 

 this machine is easily put in and out of gear by means of a lever (a) ; and since it has 

 become the fashion to sow pulverised manure with turnip seed , two hoppers (b, b) have 



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