It is manifest, therefore, that the more or less equal periods perceived in Nature gave the first units of measure for time; as did Nature's more or less equal lengths and weights give the first units of measure for space and force.
— from Illustrations of Universal Progress: A Series of Discussions by Herbert Spencer
It is manifest, therefore, that the approximately equal periods perceived in Nature gave the first units of measure for time; as did Nature’s approximately equal lengths and weights give the first units of measure for space and force.
— from Essays: Scientific, Political, & Speculative; Vol. 2 of 3 Library Edition (1891), Containing Seven Essays not before Republished, and Various other Additions. by Herbert Spencer
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