148 MECHANICS. 



tered to any desired degree : tliis is effected by a move- 

 ment of the upper handle, represented in the figure. By 

 the lower handle, the whole is accurately guided. It is 

 said that two men, one to lead the horse, and the other to 

 guide the implement, will dress ten acres of root-crops in 

 a single day, and that it has proved eminently a labor- 

 saving machine. It can be used only on smooth land, 

 free from stone. 



TWO-IIORSE CULTIVATORS 



are made to run on two wheels, and the depth of the 

 teeth is regulated by raising or lowering the frame-work 

 that holds them. They have been much used for pulver- 

 izing the surface of inverted sod, and fitting it for the re- 

 ception of seed, but are likely to be superseded for this 

 purpose by Shares' harrow. Modified so as to pass the 

 two spaces between three rows of corn, they are known 

 as double culti'vators, and have now come into use for cul- 

 tivating large fields, and are generally adopted for this 

 purpose at the West. They accomplish twice the work 

 of the single cultivator. They are of two kinds : those 

 called the sulky cultivators, being furnished with a seat 

 on which the driver rides, and the walking cultivators, 

 without seat, the attendant walking behind. The former 

 will accomplish more work in a day, with less fatigue to 

 the driver ; the walMhig cultivators are better suited to 

 rough, or sidling ground, and are cheaper. Many manu- 

 facturers make them of different forms, both at the West 

 and in some of the more eastern States. The best sulky 

 cultivators cost about $75. 



This new machine, which has been used to some extent 

 in the broad fields of the West, forks up the soil by means 

 of a series of revolving teeth. It is drawn by two or 

 four horses, according to its size and the strength of the 



