It is possible that others with only a mild interest in literature may be equally ignorant; I quote therefore the law:
Section 211 of the United States Criminal Code provides:
"Every obscene, lewd, or lascivious, and every filthy book, pamphlet, picture, paper, letter, writing, print, or other publication of an indecent character and every article or thing designed, adapted, or intended for preventing conception or producing abortion, or for any indecent or immoral use; and every article, instrument, substance, drug, medicine, or thing which is advertised or described in a manner calculated to lead another to use or apply it for preventing conception or producing abortion, or for any indecent or immoral purpose; and every written or printed card, letter, circular, book, pamphlet, advertisement, or notice of any kind giving information directly or indirectly, where, or how, or from whom, or by what means any of the hereinbeforementioned matters, articles, or things may be obtained or made, or where or by whom any act or operation of any kind for the procuring or producing of abortion will be done or performed, or how or by what means conception may be prevented or abortion produced, whether sealed or unsealed; and every letter, packet, or package, or other mail matter containing any filthy, vile or indecent thing, device, or substance; any and every paper, writing, advertisement, or representation that any article, instrument, substance, drug, medicine, or thing may, or can, be used or applied for preventing conception or producing abortion or for any indecent or immoral purpose; and every description calculated to induce or incite a person to so use or apply any such article, instrument, substance, drug, medicine, or thing, is hereby declared to be non-mailable matter and shall not be conveyed in the mails or delivered from any post-office or by any letter carrier. Whoever shall knowingly deposit, or cause to be deposited for mailing or delivery, anything declared by this section to be non-mailable, or shall knowingly take, or cause the same to be taken, from the mails for the purpose of circulating or disposing thereof, or of aiding in the circulation or disposition thereof, shall be fined not more than five thousand dollars, or imprisoned not more than five years, or both."