226 FARM MECHANICS 



notch. Some of these machines are made with blades 

 reversible, so that the other side can be used for cut- 

 ting when the first edge is worn. For summer use the 

 steel drag works very well, but it lacks the smoothing 

 action of a well balanced log drag. 



SEED HOUSE AND BARN TRUCKS 



Bag trucks for handling bags of grain and seeds 

 should be heavy. Bag truck wheels should be eight 

 inches in diameter with a three-inch face. The steel 



Figure 225. Barn Trucks. The platform truck is made to move 

 boxed apples and other fruit. The bag truck is well proportioned 

 and strong, but is not full ironed. 



bar or shoe that lifts and carries the bag should be 

 twenty-two inches in length. That means that the bot- 

 tom of the truck in front is twenty-two inches wide. 

 The wheels run behind this bar so the hubs do not pro- 

 ject to catch against standing bags or door frames. The 

 length of truck handles from the steel lift bar to the 

 top end of the hand crook is four feet, six inches. In 



