The Site Survey — Finding the Power in Water and Wind with No Instruments

Two numbers, twice.

Book Four measures what a site can actually give. Part One is the water: flow by bucket, by float, and by weir; head by hose and by level and stick; what the pipe takes back; and turning two numbers into watts, a wheel, and a year of water.

Part Two is the wind: reading it, testing it, and turning it into honest watts — closing with a worked survey from start to finish.