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GROWTH OF NATION STATES. I. GROWING FOOD SUPPLY A. USING HORSEPOWER 1. IMPROVEMENT – USE OF THE COLLAR HARNESS 2. EFFECT a. COULD PLOW TWICE AS MUCH LAND.
Documents GROWTH OF NATION STATES. I. GROWING FOOD SUPPLY A. USING HORSEPOWER 1. IMPROVEMENT – USE OF THE...

GROWTH OF NATION STATES I. GROWING FOOD SUPPLY A. USING HORSEPOWER 1. IMPROVEMENT â USE OF THE COLLAR HARNESS 2. EFFECT a. COULD PLOW TWICE AS MUCH LAND b. INCREASED FOOD…

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