What does Entered According to an Act of Congress mean?
You may find wording in your book beginning "Entered according to Act of Congress..." this is an early form of copyright statement. You will typically find this same statement in the majority of American published works from the late 19th century (it reflects changes in the copyright law made in the 1860s when Congress ordered two copies of each copyrighted work to be deposited at the Library of Congress).
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