82 Be POUT ON Trials of Plows. 



We believe that Mr. Davis was the first to dispense Avith the 

 perforation and consequently the weakening of the beam, in order 

 to insert the coulter. His plan of attaching it to the side was 

 imperfect as compared with modern methods, but it was a step in 

 the right direction. 



The inventors of plows now multiply so rapidly that we shall 

 cease to enumerate all the patents that were granted, and confine 

 ourselves to those which involve ncAV ideas, or those which have 

 been remarkably popular. Zadock Harris, of Washington county, 

 in the State of New York, received a patent on the 17th day of 

 March, 1819, for an improvement in the pk)\v, a figure of which 

 is given. 



J^iff. es. 



The following extracts from the specification will make the 

 drawinof intelligible: 



"This plow is different from all other plows, inasmuch as the 

 land side i-s composed of three plates which are fixed over each 

 other, and the lower or under part of the plow is composed of 

 two plates, Avith other pieces combined and connected, as here- 

 after described. 



" The first land side plate and the under plate are cast togethei', 

 each in their proper direction or position, which is nearly at right 

 angles. 



" The lower part of the land side is so formed as to l)e of double 

 the thickness of the upper part, so that the upper part m;iy 

 receive the cutter which fits the sunken part and rests on the pro- 

 jecting thickness which forms an angle of about twelve degrees 

 rising towards the back part of the plow. 



"At the upper end of the said angular line there is a groove 

 or cavity with a number of indents for the purpose of receiving 



