Post cards bearing particles of glass, metal, mica, sand, tinsel, etc., are unmailable.
All matter concerning any lottery, so-called gift concert, or other enterprise of chance, or concerning schemes devised for the purpose of obtaining money or property under false pretenses.
For knowingly concealing or inclosing any matter of a higher class in that of a lower class, and depositing or causing the same to be deposited for conveyance by mail at a less rate than would be charged for both such higher and lower class, the offender will be liable for every such offense to a fine of $10. { 134}
The domestic rates apply to the United States, Porto Rico, Guam, Philippine Islands, Shanghai (China), Tutuila, Cuba, Canada,[27] Mexico,[27] Hawaii, Republic of Panama and the Panama Canal Zone.
Mail matter addressed to countries in the Universal Postal Union is subject to the following rates: Letters and sealed packages, 5 cents for one ounce or fraction thereof, and 3 cents for each additional ounce or fraction thereof, if prepaid, and double that rate if not prepaid, except Great Britain, and Germany (if sent by steamers sailing for Germany direct), which is 2 cents per ounce.
Postal and private mail cards, 2 cents each.
Printed matter of every kind, commercial papers, samples of merchandise, 1 cent each 2 ounces or fraction thereof, but at least 5 cents must be paid on each packet of commercial papers and 2 cents on each packet of samples of merchandise.
Mail schedules showing the name of steamer, hour of closing of the mail at the General Post-Office, etc., may be found in the corridors of the General Post-Office or any of its stations. { 135}
Exceptions for Cuba, Mexico, Canada, and Republic of Panama
Matter mailed in United States addressed to MEXICO is subject to the same postage rates and conditions as that addressed in the United States, except that articles of miscellaneous merchandise (fourth-class matter) in unsealed packages not sent as bona fide trade samples are required to be sent by “Parcels Post,” and that the following articles are absolutely excluded from the mails:
All sealed packages other than letters in the usual form; all packages (including packages of second-class matter which weigh more than 4 pounds 6 ounces), except such as are sent by parcels post; publications which violate any copyright law of Mexico.