the Philadelphia Centennial Exhibition. 
Fig. 61.— Back View of Bu/ord's Sulky Plough 
plough is suspended and carried on the frame. It is furnished with two levers, 
one on each side of the driver, but is operated by the right-hand lever only, 
the left being used to make the plough run level when opening land and back 
furrowing, ploughing on hillsides, or varying the depth of furrow. The seat 
is carried on a strong circular bracket. 
Messrs. Collins and Co., Hartford, Connecticut, showed a good Gang 
Plough, of which the chief features are that the draft is taken from the centre 
of the machine. It is designed for three horses abreast, one on the right and 
two on the left of the pole, the draft being regulated by compensating leverage. 
The frame, which is strongly braced, is carried on a crank-axle. The 
different and controllable angles of the wheel-arms regulate the respective 
positions of the land- and furrow-wheels. The frame is of cast iron. The 
shares and mould-boards are cast steel, with revolving wheel coulters. 
The wheels, which have wrought-iron tires, are 42 inches diameter. The 
price is 90 dollars. 
Stevens, Foster and Co., Chicago, showed their Eotary Gang Plough, 
accompanied with a placard, offering to wager it against all comers. The 
Judges, at the solicitation of the exhibitor, went out to see the implement at 
work, and were not repaid for their trouble. On land that had been recently 
ploughed, the soil was well stirred; but on a dry stubble the depth was 
very unequal, and the bottom left in ridges. This is exactly what I should 
have anticipated, from the nature of the rotating disc-wheels, which take 
the place of the ordinary plough. The reader will understand the nature of 
the implement from the following description. A strong iron frame is sup- 
ported on two high wheels in front, and one swivel-wheel behind, the latter 
