Part 12

With a SPLENDID PREMIUM to the person who forms the Club, consisting of a copy of the celebrated Steel Plate Engraving, "Men of Progress."

Address

MUNN & CO., PUBLISHERS OF THE SCIENTIFIC AMERICAN. 37 PARK ROW, NEW YORK.

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THE "Scientific American" is printed with CHAS. ENEU JOHNSON & CO.'S INK. Tenth and Lombard sts. Philadelphia, and 59 Gold st. New York.