Wheel and Swin^ Ploughs. 



143 



in opposite directions^ and tlie curved sides approach more nearly 

 towards each other accordingly. This degree of approximation in 

 the plates is shown on the scale, in divisions corresponding to half 

 and whole hundred- weights, by means of a cross-rod secured to 

 one plate acting on a crank attached to the opposite one ; thus 

 communicating its effect to the lever-index, which, moving 

 over the divisions of the scale, marks the varying degree of 

 force exerted at each moment by the draught to which the instru- 

 ment is subjected. The index was marked down every few 

 yards, at moments when its oscillation was steady and the 

 draught uniform, and the mean of the whole then taken. The 

 length of the field and back was the trial in each case. It was 

 observed that the inclination or declination of ground made very 

 trifling difference, owing, probably, to the position of the horses 

 acting upon the beam at an inverse angle. 



Ploughs tried at Ipswich^ November, 1838. 



Description of Ploughs. 



Maker and Mark. 



Weight of each 

 Plough. 



Draught, 



Rutland, with Wheels . . 



Ransome, 

 N.L. 



cwt, qrs. lbs. 



1 3 22 



cwt. qrs. lbs. 

 2 1 21 



Bedfordshire, with 



Ransome. 

 L.L. 



1 3 26 



2 3 24 



Lincolnshire Swing , , 



White, with 

 Ransome's Irons, 

 B.M. 



1 0 18 



3 0 0 



Lincoln Heath .... 



Ditto. 

 L.H. 



1 1 1 



3 0 11 



