Volume 20 — POPULAR LITERATURE AND SCIENCE.
Reading edition
JULY, 1877.
Entered according to Act of Congress, in the year 1877, by J. B. Lippincott & Co., in the Office of the Librarian of Congress, at Washington.
Reading edition
Entered according to Act of Congress, in the year 1877, by J. B. Lippincott & Co., in the Office of the Librarian of Congress, at Washington.