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.

GOLD PENS!!--In consequence of the increased facility afforded by machinery for the manufacture of my GOLD PENS, I am enabled to furnish them to the Trade, at a much less price than they have heretofore obtained them through my Agent.

Those purchasing direct of the manufacturer will have the double advantage of the lowest market price, and the privilege of returning those that are imperfect. In connection with the above, I am manufacturing the usual style of PENHOLDER, together with PENCIL. All orders thankfully received, and punctually attended to.

A. G. BAGLEY,
sept 25. 1* 189 Broadway. N. Y.

SHERWOOD'S MAGNETIC MACHINE,--Is warranted to be greatly superior to every other manufactured, by whatever imitations or pretensions foisted upon the public. No premium has ever been obtained over this machine at the American or any other Institute, as has been falsely represented. It imparts the magnetic forces more continuously, with less violence to the sensations of the patient, and with more permanent efficacy, than any other invented, while the cures it has actually effected are incomparably more numerous. It is compactly fitted, together withs it batteries, wires and other appliances in neat cases, of several sizes, and powers, at $10, $12, $14, and $16 each. Each case is accompanied with a Manual, (eighth edition, pp. 234, 8vo.) in the English or French language, according to order, containing specific direction for the new method of using the instrument, and which alone can render it effectual.

H. H. SHERWOOD, M.D.
102 Chambers st.
sept. 8to2*

General Patent Agency

The subscriber has established an agency at his warehouse, 12 Platt street, New York, for the protection and general advancement of the rights and interests of Inventors and Patentees.

The objects of this agency are more particularly to aid and assist Inventors and Patentees in effecting sales of their inventions and of goods and wares made therewith--and also for the sale and transfer of Patent Rights.

Arrangements have been made with a lawyer familiar with the Patent Laws, who will attend to the legal branch of the business upon reasonable terms. Satisfactory references will be given. Applications may be made to the undersigned personally, or by letter, post paid.

SAMUEL C. HILLS
45-2dv6* General Patent Agent.