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��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
�� �
