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Unmailable Matter

The following matter is inadmissable to the mails: that which is illegibly or insufficiently addressed, not prepaid and of the second, third and fourth class; excessive in weight; harmful in its matter, as poisons, explosives or inflammables, matches, animals, reptiles, fruit and vegetables liable to decay, or exhaling a bad odor; spirituous or malt liquors, cocaine and its derivatives, liquids liable to explosion, spontaneous combustion, or ignition by shock (kerosene, oil, etc.); obscene matter, articles intended for immoral purposes, libelous, threatening or defamatory language exposed so that it may be read; matter concerning any lottery or other enterprise of chance, or schemes to obtain money or property under false pretenses; postcards bearing particles of glass, mica, sand, tinsel, etc., unless tightly sealed in envelopes.

Complaints and Lost Mail Matter. All complaints and enquiries relative to lost mail matter of every description should be addressed to the post-master.

Return of Mail Matter. The only domestic mail matter which, when undeliverable is returnable to the sender without additional postage is letters and other first class matter prepaid two cents; official matter mailed under penalty envelopes or frank, and double postcards, but not single postcards nor postals. First class matter must remain in the post office for delivery three days; it will then be returned to the sender at the end of the time indicated if the envelope is endorsed "After-days, return to" etc.: otherwise it will be returned at the end of thirty days. Second class matter is returnable only upon new prepayment at the rate of one cent for each four ounces or fraction; third and fourth class matter at the rate chargeable when originally mailed.