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SCIENTIFIC AMERICAN.

ESTABLISHED 1845.

MUNN & CO., Editors and Proprietors.

PUBLISHED WEEKLY AT NO. 37 PARK ROW, NEW YORK.

O. D. MUNN. A. E. BEACH.

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TERMS FOR THE SCIENTIFIC AMERICAN.

One copy, one year postage included $3 20

One copy, six months, postage included 1 60

Clubs.--One extra copy of THE SCIENTIFIC AMERICAN will be supplied
gratis for every club of five subscribers at $3.20 each: additional
copies at same proportionate rate. Postage prepaid.

Remit by postal order. Address

MUNN & CO., 37 Park Row, New York.

To Advertisers--The regular circulation of the Scientific American
is now Fifty Thousand Copies weekly. For 1880 the publishers
anticipate a still larger circulation.

The Scientific American Supplement

Is a distinct paper from the Scientific American. THE SUPPLEMENT
is issued weekly. Every number contains 16 octavo pages, uniform in size
with Scientific American. Terms of subscription for Supplement,
$5.00 a year, postage paid, to subscribers. Single copies, 10 cents. Sold
by all news dealers throughout the country.

Combined Rates--The Scientific American and Supplement, will be sent for
one year, postage free, on receipt of _seven dollars_. Both papers to
one address or different addresses as desired.

The safest way to remit is by draft, postal order, or registered letter.

Address MUNN & CO., 37 Park Row, N. Y.

Scientific American Export Edition.

The Scientific American Export Edition is a large and splendid
periodical, issued once a month. Each number contains about one hundred
large quarto pages, profusely illustrated, embracing (1.) Most of the
plates and pages of the four preceding weekly issues of the Scientific
American, with its splendid engravings and valuable information; (2.)
Commercial, trade, and manufacturing announcements of leading houses.
Terms for Export Edition, $5.00 a year, sent prepaid to any part of the
world. Single copies 50 cents. Manufacturers and others who desire to
secure foreign trade may have large, and handsomely displayed
announcements published in this edition at a very moderate cost.

The Scientific American Export Edition has a large guaranteed
circulation in all commercial places throughout the world. Address MUNN
& CO., 37 Park Row, New York.

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NEW YORK, SATURDA