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AGRICULTURAL ENGINEERING 



tree usually has short metal levers placed over a wooden 

 evener, as illustrated in Fig. 215. This gives the advantage 

 of a shorter hitch. A shorter hitch will not cause an appre- 



Fig. 215. A factory-made tripletree which offers advantage of a close 



hitch. 



ciable reduction of the draft, but will enable the team to 

 have better control over the implement. 



Four-, Five-, and Six-Horse Eveners. The four-horse 

 evener is usually made as illustrated in Fig. 217. This con- 

 sists in a four-horse evener with two doubletrees attached. 



The plain five-horse evener is made as shown in Fig. 216. 

 The dimensions given are right for medium-sized horses when 

 it is desired to work them together as closely as practical. 



There has been a decided increase in the use of the 14-inch 

 gang plow during recent years. This plow makes a load too 

 heavy for four average horses, and five or six horses should 

 be used. It is undesirable to work five horses abreast, for, 

 if one horse walks in the furrow and the other four on the land, 

 the load or line of draft does not come directly behind the 

 center of the team and there will be much undesirable side 

 draft. It is better to put two horses in the lead and use 



Fig. 216. A plain five-horse evener. 



eveners such as those shown in Fig. 217. This will put the 

 team directly in front of the load and will avoid the side draft. 

 Instead of the short levers placed under the rear doubletree 



