252 



Report on Trials of Plows. 



an elongated eye, C D E F, the axis of which forms an angle of 

 20*^ with the vertical line, the upper end of the eye being directed 

 to the opposite harrow; these eyes are connected by a three- 

 quarter inch iron rod, A B, running through them. By this 

 arrano-ement a backward and forward motion to the extent of 

 nine inches, and an upward and downward motion to the extent 

 of six inches is allowed to each side of the harrow, which adapts 

 them admirably to work in rough and uneven ground. The 

 draught is taken by rods hooking over a bar of iron between the 

 two inner beams two feet long, vibrating on an iron arc of a 

 circle having a chord of 32 inches. These rods run back to hinge 

 on the third tooth of the harrow. The evener is attached by a link 

 to one end, and by a chain to the other 18 inches long. The chord 

 of the right arc is 25 inches. The frame of the harrow is made 

 of white oak. The wooden bars are 2| inches square and 8i 

 inches apart. The tracks of the teeth are 4 inches apart. It is 

 drawn diagonally. 



The draft of this harrow over ground which had been previ- 

 ously harrowed was 314 pounds; over ground which had not 

 been previously harrowed, 371 pounds. 



The harrow is made in the best possible manner, the mate- 

 rials are of the best quality, and the workmanship is most thor- 

 ough and conscientious throughout. It will be seen from the 

 description given above that it has a wide range of self-adjust- 

 ment and self-adaptation, and is easily kept clear of weeds and 

 other accumulations. The teeth track vcrv well, no one tooth in 



