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Cast Iron Driving Wheels
1853
Scientific American
of Macon , Q.e . ��ia , has invented a very ingenious and ori�al im provement for regulating the speed of steam engines , by cutting off the steam in the steam box when it exceeds the established velocity.
doi:10.1038/scientificamerican08201853-388b
fatcat:sjamp6iw35fftlx55r4rziptce