Address

MUNN & CO.,

PUBLISHERS OF THE SCIENTIFIC AMERICAN.

37 PARK ROW, NEW YORK.

* * * * *

THE "Scientific American" is printed with CHAS. ENEU JOHNSON & CO.'S

INK. Tenth and Lombard sts. Philadelphia, and 59 Gold st. New York.

Scientific American, Volume XXIV., No. 12, March 18, 1871 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 194 / 194 题