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AGRICULTURAL ENGINEERING 



I 



Fig. 173. A hay carrier on 

 steel track. 



carriers." If the lower part of the carrier can be turned 

 about without removing from the track, the carrier is said 

 to be reversible. 



Tracks. A rather large variety 

 of steel and wooden tracks for car- 

 riers is found upon the market. 

 The wooden track is usually made 

 of material four inches square. 

 Steel tracks usually have a T or 

 cross form of cross-section. Often 

 the latter is called "double- 

 beaded" tracks. Various forms 

 of switches are provided to convey 

 hay in different directions from 

 the point of loading. In round barns, pulleys are provided 

 for carrying the rope around the circular track. 



QUESTIONS 



1. What is the standard cutting mechanism for mowers? 



2. Describe the two general types of mowers. 



3. Discuss some of the important features of construction. 



4. Why is a gear drive preferable to a chain drive? 



5. What parts of a mower are subject to excessive wear? 



6. Describe the two principal adjustments of a mower. 



7. Explain the points to consider in selecting a sulky rake. 



8. Explain the construction and use of the hay tedder. 



9. Describe two types of side-delivery rakes. 



10. Describe two types of hay loaders and give the merits of each. 



11. State the difference between overshot and swinging stackers. 



12. How may homemade outfits be arranged for field stacking? 



13. Describe the usual barn equipment for handling hay. 



14. Describe the construction of single- and double-harpoon, 

 derrick, and grapple forks. 



15. What advantages do slings offer for unloading hay? 



16. Describe the different hay carriers. 



17. What kinds of hay carrier tracks are in general use? 



