276 Report of the Special Committee. 



(d) No. 69 requires 1.18 pounds less power for each square 

 inch of sectional area than the swivel and 2.14 pounds less for 

 each inch in depth. The swivel consumes 80.14 pounds and No. 

 69 consumes 78.00 pounds of power for each inch of depth. 



(e) No. 65 consumes 0.95 pounds more of power for each square 

 inch of sectional area of furrow than the sod and subsoil plow, and 

 3.94 pounds more for each inch of depth. No. 65 consumes 81.94 

 pounds, and the sod and subsoil 78.00 pounds for each inch of depth. 



In order to afford the means of comparison, we here insert some 

 of the results arrived at by Mr. Pusey and Mr. Morton, which 

 are given in full in the report on the trials of plows at Utica, in 

 September, 1867: 



The average draught of Mr. Pusey's first four furrows of 5, 6, 

 7 and 8 inches deep was 53.84 pounds for each inch in depth. 

 The average draught of his last four furrows, 9, 10, 11 and 12 

 inches deep, was 57 pounds for each inch in depth. In both cases 

 the furrow Avas nine inches wide. 



In Mr. Morton's experiments the shallower furrovv^s showed an 

 average draught of 85.40 pounds for each inch in depth; the 

 deeper ones averaged 94.62 pounds; the furrow in both cases was 

 nine inches. 



The power required in Mr. Pusey's experiments for each square 

 inch of average sectional area of the furrow slice in the four 

 shalloAvest furrows was 5.98 pounds; the four deepest furrows 

 required 6.33 pounds. 



In Mr. Morton's, each square inch of sectional area in the 

 shallowest furrows required 9.49 pounds, and for the deepest 

 10.51 pounds. 



The experiments of Messrs. Pusey and Morton agree in making 

 the power required to turn each square inch of the sectional area 

 greater in deep than in shallow furrows, the excess, according to 

 Mr. Pusey, being six per cent, and according to Mr. Morton it is 

 ten per cent. According to our experiments it is seventeen per 

 cent less. Ours were made with different ploAvs, while each of 

 theirs was made with the same plow, which may partly account 

 for the discrepancy. But the practical point is very clear, from 

 all the experiments, that the power required for deep plowing is 

 not materially greater in proportion to the work done. A furrow 

 twelve inches deep can be plowed with about twice as much power 

 as a furrow six inches deep. The actual power consumed by 

 each successive inch in depth was, aecoi'ding to the average of 



