A tool is usually more simple than a machine; it is generally used with the hand, whilst a machine is frequently moved by animal or steam power.Quote by Charles Babbage about power
Another mode of accumulating power arises from lifting a weight and then allowing it to fall.Quote by Charles Babbage about power
The force of vapour is another fertile source of moving power; but even in this case it cannot be maintained that power is created.Quote by Charles Babbage about power