Methods of irrigation: The farmers in ancient Egypt dug trenches to divert water from the Nile to bordering lands. ... Basin irrigation allowed the ancient Egyptians to control the rise and fall of the river to best suit their agricultural needs. Basin irrigation provided water throughout the different seasons.
The average work day was probably fourteen to sixteen hours. Electric lights allowed for workers to work longer, and not just when it was light outside. Therefore, the work day was increased.
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Enlightenment 1700's
Napoleonic Wars 1800's
Congress of Vienna 1800's
German Unification 1870's
To find the area of a triangle it is hight time base divided by 2
so 3x6 = 18/2 = 9ft squared
So you will need 9 ft^2