550 



Popular Science Monthly 



Harvesting in North Dakota with a Ford car for motive power 



Orchard plow- 

 ing with a small 

 caterpillar trac- 

 tor. For such 

 Vsfork the ma- 

 chine must be 

 very low so that 

 it can crawl un- 

 der trees easily. 

 This type o f 

 tractor can ob- 

 tain an e n o r - 

 mous grip on 

 the soil because 

 of the unusual 

 length and 

 breadth of its 

 track or contact 

 service 



A small tractor running a big corn shellei . Wi,.:. „ „ ^.tor is not engaged in field v. .. .-, 



be otherwise employed usefully 



