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three quarters, and at five (hillings per bufhel 

 amounts to 7I. 3s. yd. 



Calculations may be of fervice to thofe who 

 wifh to try drilling, and have few books to di- 

 rect them. 



One acre is ten chains long, of 660 feet, or 

 220 yards long, and one yard broad, containing 

 4840 fquare yards. Then if the ridge be four 

 feet fix inches, this makes fourteen ridges, and 

 three feet to fpare. This length of 220 yards, 

 multiplied by fourteen, (the number of ridges) 

 gives a length of 3080 yards, to which add 146 

 for the fpare three feet, and it will be 3226 yards. 

 And as two rows are drilled on a ridge, the 

 number of rows will be in length 6452 yards; 

 but as a deduction of 172 yards mud be made 

 for the head ridges, fuppofe three yards each, 

 &c. the whole length to be fown will be 62 80 

 yards clear. 



Now, a gallon [Winchefter] holds about eighty 

 thoufand grains. The quantity recommended to 

 be drilled by Mr. Forbes and others, being fix 

 gallons, or two-thirds of a buihel per acre, is 

 nearly feventy-eight grains to a yard, or twenty- 

 fix to a foot. But in my experiment, by this 



calculation^ 



