On each letter weighing not more than one-half ounce three cents, and for each additional half-ounce or fraction thereof, three cents.
All packages containing matter not in itself chargeable with letter postage, but in which is enclosed or concealed any letter, memorandum, or other thing chargeable with letter postage, or upon which is any writing or memorandum; and manuscripts for publication in newspapers, magazines, or periodicals—three cents for each half-ounce or fraction thereof. Weight of packages limited to four pounds.
On local or drop letters, at offices where free delivery by carriers is established, two cents for each half ounce or fraction thereof; and where free delivery has not been established, one cent for each half ounce or fraction thereof.
On seeds, cuttings, bulbs, roots and scions, one cent for each ounce or fraction thereof. Weight of packages limited to four pounds.
On pamphlets and occasional publications, all transient printed matter, unsealed circulars, book manuscripts, proof sheets, corrected proof sheets, maps, prints, engravings, etc., one cent for each ounce or fraction thereof. Weight of packages limited to four pounds.
On samples of ores, metals, minerals, and merchandise, one cent for each ounce or fraction thereof. Weight of packages limited to four pounds.
On books, one cent for each ounce or fraction thereof. Weight of packages limited to four pounds.
All domestic matter, including newspapers, magazines and periodicals sent to actual subscribers from a known office of publication, must be prepaid by postage stamps affixed thereto.
Newspapers issued weekly, or oftener, and sent from publishers or news agents, to subscribers or dealers, two cents per pound; and if not issued as often as weekly, three cents per pound.