Il8 FARM MACHINERY 



putting fall grain in corn ground while the corn is stand- 

 ing. The disk drill has been displacing the hoe drill 

 because it does not clog as easily with corn leaves. Fig. 

 87 shows a five-disk drill with a footboard so arranged 

 that the operator may ride when it is necessary to add 

 his weight to secure greater penetration. 



160. Construction. In purchasing a drill it might be 

 well to investigate the construction. The implement, be- 



FIG. 87 A FIVE-DISK DRILL FOR DRILLING BETWEEN CORN ROWS. THE 

 CENTER FURROW OPENER IS A DOUBLE DISK 



cause it is so heavy and often wide, should be provided 

 with a strong frame. Angle bars or either round or 

 square pipes are used to make the main frame. The 

 frames are often provided with truss rods in order to 

 stiffen them as much as possible. Some of the heavier 

 drills are now made with tongue trucks much like disk 

 harrows referred to in a preceding chapter. They are a 

 very satisfactory addition. 



161. Draft of drills. Drills are not as a rule light of 

 draft for the number of horses used. The following re- 



