Chapter CCLXXXI. *to authorize the Use in Post Offices of Weights of the Denomination of Grains.*July 27, 1866. *Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled*, Postal balances denominated in grams of the metric system may he furnished certain post-off
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CHAP. CCLXXXI.— An Act *to authorize the Use in Post Offices of Weights of the Denomination of Grains.*July 27, 1866. *Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled*, Postal balances denominated in grams of the metric system may he furnished certain post-offices.One half ounce to be the equivalent of fifteen grams.That the Postmaster-General be, and he is hereby, authorized and directed to furnish to the post offices exchanging mails with foreign countries, and to such other offices as he shall think expedient, postal balances denominated in grams of the metric system; and, until otherwise provided by law, one half ounce avoirdupois shall be deemed and taken for postal purposes as the equivalent of fifteen grams of the metric weights, and so adopted in progression; and the rates of postage shall be applied accordingly.
Approved, July 27, 1866.