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Ludi wrote:http://www.lowtechmagazine.com/
In the 1580s the Italians, using the same systems employed by the Romans, moved obelisks around Rome at the decree of the pope. Some of them weighed over 500 tons, which only the most powerful of modern cranes today could handle- all done with human and draught animal power. Towards the end of the nineteenth century, however, just before steam power took over, human powered lifting devices became so elaborate that one man could lift a 15 tonne truck in no time, using only one hand.
We could lift anything without fossil fuels. Nevertheless, apart from their use by some hardcore ecological architects, human powered cranes have completely disappeared, even for the lightest of loads. We prefer lifting things with power machinery and we run (not walk) on a treadmill in the gym to keep in shape.

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