o 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., PUBLISHERS,

361 BROADWAY, NEW YORK, N.Y.

* * * * *

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.

THE SCIENTIFIC AMERICAN

Architects and Builders Edition.

$2.50 a Year. Single Copies, 25 Cents.

This is a Special Edition of THE SCIENTIFIC AMERICAN, issued monthly--on
the first day of the month. Each number contains about forty large
quarto pages, equal to about two hundred ordinary book pages, forming,
practically, a large and splendid MAGAZINE OF ARCHITECTURE, richly
adorned with _elegant plates in colors_ and with fine engravings;
illustrating the most interesting examples of modern Architectural
Construction and allied subjects.

A special feature is the presentation in each number of a variety of the
latest and best plans for private residences, city and country,
including those of very moderate cost as well as the more expensive.
Drawings in perspective and in color are given, together with full
Plans, Specifications, Costs, Bills of Estimate, and Sheets of Details.

No other building pap