OF
POPULAR LITERATURE AND SCIENCE.
JULY, 1880.
Entered according to Act of Congress, in the year 1880, by J.B. Lippincott & Co., in the Office of the Librarian of Congress, at Washington.
Entered according to Act of Congress, in the year 1880, by J.B. Lippincott & Co., in the Office of the Librarian of Congress, at Washington.