1. 1 Economic History Medieval Era (500 – 1400 AD) Feudalism -- Western Europe Second Agricultural Revolution (900 - 1500 AD) Stirrup Horse Collar

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6. 6 Modern Horse Collar

7. 7 Economic History Medieval Era (500 – 1400 AD) Feudalism -- Western Europe Second Agricultural Revolution (900 - 1500 AD) Stirrup Horse Collar Horse Power Vertical Plow

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10. 10 Economic History Medieval Era (500 – 1400 AD) Feudalism -- Western Europe Second Agricultural Revolution (900 - 1500 AD) Stirrup Horse Collar Horse Power Vertical Plow 3 Field Crop Rotation

11. 11 Wheat - Year 1 Fallow - Year 2 Fallow - Year 1 Wheat - Year 2 Field one 300 acresField two 300 acres Wheat - year 1 Legume- year 2 Fallow – year 3 Legume-year 1 Fallow - year 2 Wheat - year 3 Fallow - year 1 Wheat - year 2 Legume - year 3 Field one 200 acres Field two 200 acres Field Three 200 acres Two Field Crop Rotation Three Field Crop Rotation

12. 12 Two field rotation Plowing 300 + (300 x 2) = 900 Acres Crop300 Acres Ratio 300/900 =.33 Three field rotation Plowing 200 + 200 + (200 x 2) = 800 Acres Crop 400 Acres Ratio 400/800 =.50 How much new land can be brought into production with same amount of work? A. 100 acres B. 50 acres 75 acres C. 75 acres

13. 13 Accumulation--Economic Surplus How is it used?

14. 14 Cities - cathedrals

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