In estimating erosion, Playfair's Law is an empirical relationship that relates the size of a stream to the valley it runs through. It is better defined as a theory rather than law.
Read more about Playfair's Law: Definition, Equation, See Also
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“They who say that women do not desire the right of suffrage, that they prefer masculine domination to self-government, falsify every page of history, every fact in human experience. It has taken the whole power of the civil and canon law to hold woman in the subordinate position which it is said she willingly accepts.”
—Elizabeth Cady Stanton (1815–1902)