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The Jeffersonian cyclopedia;

a comprehensive collection of the views of Thomas Jefferson classified and arranged in alphabetical order under nine thousand titles relating to government, politics, law, education, political economy, finance, science, art, literature, religious freedom, morals, etc.;

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8122. STANDARD (Weights), Ratios.—
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8122. STANDARD (Weights), Ratios.—

The weight of the pound troy is to that of the
pound avoirdupois as 144 to 175. It is remarkable
that this is exactly the proportion of the
ancient liquid gallon of Guildhall of 224 cubic
inches to the corn gallon of 272. It is further
remarkable still that this is also the exact proportion
between the specific weight of any measure
of wheat and of the same measure of water.
* * * This seems to have been so combined as
to render it indifferent whether a thing were
dealt out by weight or measure.—
Coinage, Weights and Measures Report. Washington ed. vii, 484.