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This cumbersome quality of early 19th-century steam engines led to their being used first on ships. In the beginning the discordant relationship of machine weight to power production was a problem, but the ability to enlarge ships to a much greater size meant that the engines did not have to suffer severe diminution. A real constraint was the pattern of natural waterways; early steamboats for the most part depended on paddles to move the vessel, and it was found that those paddles tended to cause surface turbulence that eroded the banks of a narrow waterway, as most of the inland ...(100 of 22970 words)