AMERICAN HOME GARDEN. 45 



Sometimes the two outer back teeth have only single-mould 

 shares, which, by changing from side to side, may be set so as 

 to turn their little furrows either to or from the rows between 

 which they may be running. The beam may be dispensed 

 with if the rack and gauge- wheel described below is preferred. 

 The cultivator is a mere surface implement, and unless, pos- 

 sibly, in very light soils, will not save much labor, except at 

 cost of crop. The single-horse plow, or the half mouldboard, 

 followed by the corn harrow, does greatly superior work. 



The semicircular rack,&c. (Fig. 26 a) consists of two perfora- 

 Fi g . 26 . ted and matched cast-iron bands, with brace- 



bands across the diameter. The brace- 

 bands have at the forward end projecting 

 sockets, in which the arms of the gauge- 

 wheel axle work. They have also a single 

 cast-iron semicircular hol e at the centre, by which they are se- 



Rack and Gauge-wheel. cure( J to fa e Jj ar W ith a bolt that fomiS the 



axle of the rack. Upon this it is moved at pleasure, and set to 

 the desired depth by means of a loose pin or bolt passed through 

 the rack-holes above or below the bar ; the draught is by a 

 movable link, which can be fixed at any point in the semi- 

 circle. 



The rack is made to suit a bar of about four inches width, 

 and can be fitted in a few minutes to any harrow or cultivator 

 having its centre-bar of sufficient length beyond the hinges. 



SEED-SOWERS. 



The corn-planter, Fig. 27, p. 46, is a skeleton plow, with a 

 hopper, sowing-tube, and covering apparatus attached, con- 

 nected with a contrivance which, by a spring, or circular brush, 

 or otherwise, passes the requisite amount of seed from the hop- 

 per into the tube for planting, at the proper distances. There 

 are several good ones patented ; the figure represents Emery's. 



The hand seed-sower, or " barrow drill," Fig. 28, p. 46, is a 

 smaller machine, but of the same general description as the 

 corn-planter. In well-prepared soil it makes the drill, sows 

 the seed, either continuously or at given distances, covers, and 

 gently presses it. Sometimes the arrangement for covering is 



