Domestic Postage
The law requires postage on all letters (including those to foreign countries when prepaid), excepting those written by officers of the government, addressed to the department with which they are connected, and on official business, to be prepaid by stamps or stamped envelopes, prepayment in money being prohibited.
All drop-letters must be prepaid, at the rate of two cents per half-ounce or fraction of a half-ounce, by postage stamps. If not prepaid, the double rate to be charged.
The single rate of postage on all domestic mail-letters throughout the United States is three cents per half-ounce, with an additional rate of three cents for each additional half-ounce or fraction of a half-ounce. The former ten-cent (Pacific) rate is abolished.