INVENTOR OF THE MODERN PLOW. 29 



by the saw in fashioning it, by the rule in 

 meeting it, and by the chalk-line in determin- 

 ing it, the capital and distinguishing character 

 of right lines existing on, over and along the 

 peculiar curve which his mould-board de- 

 scribes, is always and inseparably present. 

 This grand and discriminating feature of his 

 mould-board, he considers as of the utmost 

 importance. 



" He therefore craves the aid and elucidation 

 of his drawing, and of his model, in their 

 totality and in their several parts, to render 

 plain and sure whatever there may be, from 

 the abstruse and recondite nature of the 

 subject, uncertain or dubious in the language 

 of his specification. 



" In the second place, the said Jethro Wood 

 claims an exclusive right and privilege in the 

 construction of a standard of cast iron, like 

 the rest of the work already described, for 



connecting the mould-board with the beam. 

 3 



