, to any
foreign country.

All the back numbers of The Supplement, from the commencement, January
1, 1876, can be had. Price, 10 cents each.

All the back volumes of The Supplement can likewise be supplied. Two
volumes are issued yearly. Price of each volume, $2.50 stitched in
paper, or $3.50 bound in stiff covers.

COMBINED RATES.--One copy of SCIENTIFIC AMERICAN and one copy of
SCIENTIFIC AMERICAN SUPPLEMENT, one year, postpaid, $7.00.

A liberal discount to booksellers, news agents, and canvassers.

MUNN & CO., 361 BROADWAY, NEW YORK, N.Y.

* * * * *

A New Catalogue of Valuable Papers

Contained in SCIENTIFIC AMERICAN SUPPLEMENT during the past ten years,
sent _free of charge_ to any address. MUNN & CO., 361 Broadway, New
York.

* * * * *

USEFUL ENGINEERING BOOKS

Manufacturers, Agriculturists, Chemists, Engineers, Mechanics,
Builders, men of leisure, and professional men, of all classes, need
good books in the line of their respective callings. Our post office
department permits the transmission of books through the mails at very
small cost. A comprehensive catalogue of useful books by different
authors, on more than fifty different subjects, has recently been
published, for free circulation, at the office of this paper. Subjects
classified with names of author. Persons desiring a copy have only to
ask for it, and it will be mailed to them. Address,

MUNN & CO., 361 Broadway, New York.

* * * * *

PATENTS.

In connection with the SCIENTIFIC AMERICAN, Messrs. MUNN & CO. are
solicitors of American and Foreign Patents, have had 42 years'
experience, and now have the largest establishment in the world.
Patents are obtained on the best terms.

A special notice is made in the SCIENTIFIC AMERICAN of all inventions
patented through this Agency, with the name and residence of the
Patentee. By the immense circulation thus given, public attention is
directed to the merits of the new patent, and sales or introduction
often easily effected.

Any person who has made a new discovery or invention can ascertain,
free of charge, whether a patent can probably be obtained, by writing
to MUNN & CO.

We also send free our Hand Book about the Patent Laws, Patents,
Caveats, Trade Marks, their costs, and how procured. Address

MUNN & CO.,
361 BROADWAY, NEW YORK.
BRANCH OFFICE, 622 AND 624 F ST., WASHINGTON, D.C.