Although Bell is famous with the creation of the telephone, it is still debated about who really developed the primary working mannequin. The Iron BridgeIn the mid-1750s, the steam engine was utilized to the water power-constrained iron, copper and lead industries for powering blast bellows. These industries have been situated near the mines, a few of which were utilizing steam engines for mine pumping. Steam engines were too powerful for leather bellows, so cast iron blowing cylinders have been developed in 1768.
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