Exhihited at the NottingJiam Meeting. 
105 
to me that there might be danger of exposing the tubes, at any rate when 
working on sidelong ground. 
I was told that seven of the old, and two of the new type of diggers are 
working 8ucc(!ssfully, and that ISs. an acre is readily paid for digging, against 
10*. for ploughing and cross-cultivation. I had no means of verifying this 
statement. 
Messrs. Charles Burrell & Son, Thetford, Norfolk, showed a 
5 b.p. Steam Digger, Proctor's Patent (Art. 36G8). 
In this machine, contrary to the practice in Darby's digger, 
the forks are placed in the rear of the engine, and consist of 
three sets of tines, six in a 
set. They are actuated by ; I'ig- U.— Proctor's Steam Digger.'^- 
a three-throw crank shaft, 
thrown into gear with the 
engine by means of an eccen- 
tric spindle. The arm to 
which the digging-tines are 
attached is driven, above, by 
the crank, and supported 
below the crank by a rocking 
or radius bar. A little to 
the rear of the main road- 
wheels of the traction engine, 
is a central wheel, or roller, 
capable of being raised or lowered by means of convenient 
hand-gear, so as to bear upon the surface of the field, should 
this be too soft to carry the weight of the implement upon the 
driving-wheels only. 
The cylinder of the engine is 6;^ inches diameter, and 9-inch 
stroke ; the nominal horse-power is 5, and the boiler pressure 
125 lbs. to the square inch. The total weight is 1^ tons, towards 
which the digging apparatus contributes about 17 cwt. The 
tines are of steel, 12,^ inches long, having chisel points If inch 
wide. 
The inventor stated that his 5-horse implement could dig 3|- 
acres, 6 inches deep, in furrows 10 inches wide, in a day of eight 
hours. An 8-horse implement was working during the Show 
in a field where ryegrass had just been cut. The soil was light 
and loamy, the machine dug about eighty spits a minute, each 
10 inches wide, and from 4 to 6 inches deep. These were pushed 
aside about 2 feet, and, for the most part, the work was very 
well done. Misses, however, often occurred, when the furrow 
was not turned over, but only shifted from its original position. 
The inventor stated that this 8-horse implement would dig 
8 acres per day of eight hours, 11 inches deep; and would 
consume 9^ cwt. of coal per day — a duty equal to that of a double 
