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Square and Elliptical Gears
So anyone care to explain to me what is special about square and elliptical gears? I know the gear ratio must be chaning but I want to know how. Also, please do not say that there is no such thing because there is. I saw it in a musuem.
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If either a public officer or any one else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were no time to warn him of his danger, they might seize him and turn him back without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river. -Mill
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