270 



Report of the Special Committee. 



REMARKS 



The furrow was not of full width ; not averaged. 



Average of fifty-seventh, fifty-eighth and fifty- 

 ninth experiments, 545 pounds. 



Average of sixtieth and sixty-first experiments, 

 512 pounds. 



Average of sixty-second, sixty-third, sixty-fourth 

 and sixty-fifth experiments, 453 pounds. 



Average of sixty-sixth and sixty-seventh experi- 

 ments, 422 pounds. 



Average of sixty-eighth, sixty-ninth, seventieth 

 and seventy-first experiments, 389 pounds. 



*0n examining the plow after it had been used in these four experiments, it was 

 found that the coulter was excessively dull ; it was, in fact, an unfinished one which 

 had been put in inadvertently when the change was made for a lap furrow. A sharp 

 coulter was then inserted. 



•f The coulter in these two experiments was very badly choaked with roots which 

 collected across its edge. To remedy this the rake was very considerably increased. 



% It was found that the coulter, in these two experiments, had slipped down so as to 

 loose the extra rake which had been given to it, and the grass roots again gathered ou 

 its edge. More rake was then given to it. 



The difference between plowing seven inches or eight inches 

 deep, according to these experiments, is 64 pounds. The same 

 plow showed a difference between seven inches and eight inches, 

 when turning a flat furrow, of 40 pounds. (Experiments forty-nine 

 to fifty-five.) 



Experiments to determine the rates of draught to depth with 

 Holbrook's Sod and Subsoil Plow No. 69, with a stubble mould- 

 board and a skim plow attached to the front of the beam: 



The skim plow turned a furrow two and a half inches deep in 

 all cases; the remainder of the furrow slice was turned by the 

 main plow. 



The column headed "Depth of furrow" indicates the whole 

 depth turned by the skim and the main plow. 



The point of the skim plow was eleven inches in advance of 

 the point of the main plow. 



