f as ] 



The tcedi arc formed and fixed in the common 

 manner, iquare, not in the fafliion of coulters, and 

 are nine or ten inches below the wood, and of fuch 

 ftrcngth as is thought thoUand requires. The teeth 

 ijut, or rather tear the ground at every four inches 

 without variation, though feemingly placed irre- 

 gularly without any rifk of choaking, except fome- 

 times at the extreme angles, where the teeth are ne- 

 ceflarily near each other, which may be cleaned with 

 die greatefl eafe, by raifing them a little from the 

 grpund. The figures i, a, &c. point out where 

 the twelve teeth on eachfide the harrow are placed, 



Where a ftrong brake-harrow is not necefTary, 

 by making the teeth fhorter or lighter, you may 

 have forty-eight teeth, which will tear the ground 

 at every two inches, or near it, cover the feed well, 

 and make a fine mould, 



-i 1 



., : It is recommended, that harrows fv>r every pur- 

 pofe, and of any fizc, be made on the above prin- 

 ciple, from which no tooth can ever follow the track 

 of another, and all are kept conflantly acting. 



. : Fig. 3, and 4, the plan and profile of a harrow 

 likewife invented by Mr. Sandilands, called a Wrack 

 Jlarrow^ from its very expeditious manner of bring- 



