Report of the Judges. 



239 



did not perceive that the twist conformed to any matheniaticul 

 principle, but it worked very well in practice. 



Class V — Sod and Subsoil Plows. 



The only entry in this class was by F. F, Holbrook, of Boston, 

 and consisted of the plow used in Class IV, with a skim plow 

 attached to the beam in front, as seen in Fig. 117. Entry No. 20. 

 Weight, 150 lbs. Price, $27. 



A full description of the stubble plow will be found in Class IV. 

 The sod and subsoil plow is No. 69, with a stubble mould-board and 

 the skim plow attached. It works from 8 to 14 inches deep, by 

 10 to 14 inches wide, according to the wishes of the plowman. 



In our trials at Utica, on ground as adverse to its good perform- 

 ance as could well be imagined, it worked 11 inches deep and 11 

 inches wide for the first two furrows, and 11 inches deep and 12 

 inches wide for the second two furrows. 



The following table shows the force which was consumed: 



The annexed table g-ives actual draught reduced from the above 

 table, the draught per cubic foot, and the averages. 



