INVENTOR OF THE MODERN PLOW. 27 



just described, and the angle between the first 

 and second sides, a line drawn parallel to the 

 diagonal line already mentioned will receive 

 the chalked string or cord, or the straight rule, 

 as on an uniform and even surface without the 

 smallest bend, sinuosity, or bunch, whereby 

 earth might adhere to the mould-board, and 

 impede the motion and progress of the Plough, 

 under, through and along the soil. 



"In like manner, if a point be taken one 

 inch behind the angle connecting the second 

 and third sides, and a perpendicular be raised 

 upon it, that perpendicular will coincide with 

 the vertical portion of the mould-board in 

 that place ; or, in other words, if a plumb line 

 be let fall so as to reach a point one inch be- 

 hind the last mentioned angle, then such a 

 plumb line will hang parallel with the mould- 

 board the whole way ; the line of the mould- 

 board there, neither projecting nor receding 

 but being both a right line and a perpendicu- 

 lar line. 



