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ADVERTISEMENTS.

[Symbol: right Index] THIS paper circulates in every State in the
Union, and is seen principally by mechanics and manufacturers. Hence,
it may be considered the best medium of advertising, for those who
import or manufacture machinery, mechanics tools, or such wares and
materials as are generally used by those classes. The few
advertisements in this paper are regarded with much more attention
than those in closely printed dailies.

Advertisements are inserted in this paper at the following rates:

One square, of eight lines one insertion, $ 0.50
" " " " " two do., .75
" " " " " three do., 1.00
" " " " " one month, 1.25
" " " " " three do., 3.75
" " " " " six do., 7.50
" " " " " twelve do., 15.00

TERMS:--CASH IN ADVANCE.

GENERAL AGENTS

FOR THE SCIENTIFIC AMERICAN.
New York City, GEO. DEXTER.
" " " WM. TAYLOR & CO.
Boston, Messrs. HOTCHKISS & CO.
Philadelphia, Messrs. COLON & ADRIANCE.

LOCAL AGENTS

Albany, PETER COOK.
Baltimore, Md., S. SANDS.
Cabotville, Mass., E. F. BROWN.
Hartford, Ct., WM. WOODWARD.
Lynn, Mass., J. E. F. MARSH.
Middletown, Ct., WM. WOODWARD.
Norwich, Ct., SAFFORD & PARKS.
New Haven, Ct., E. DOWNES.
New Bedford, Mass., WM. ROBINSON & CO.
Newark, N.J., J. L. AGENS.
Patterson, N.J., L. GARSIDE.
Providence, R. I., H. & J.S. ROWE.
Springfield, Mass., WM. B. BROCKET.
Salem, Mass., S. CHANDLER.
Troy, N.Y., W. SMITH.
Taunton, Mass., W. P. SEAVER.
Worcester, Mass., S. THOMPSON.

TRAVELLING AGENTS

V. D. DAVID, JOHN STOUGHTON, JOHN MURRAY, SYLVESTER DIERFENORF.

CITY CARRIERS

CLARK SELLECK, SQUIRE SELLECK, NATHAN SELLECK.

Persons residing in the city or Brooklyn, can have the paper left at
their residences regularly, by sending their address to the office,
128 Fulton st., 2nd floor.

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GOLD PENS!!--In consequence of the increased facility afforded by
machinery f