ientific American_ has
presented in a popular form the progress of science, invention and
industry. No periodical contains so vast a fund of trustworthy
information on timely topics of the day. Each issue is profusely
illustrated. It contains articles on such subjects of special interest
as the latest discoveries in the Scientific World, the development in
Electricity, Engineering, Machinery, Automobiles, Natural History,
Marine Architecture in all its branches, Yachting, etc. Furthermore,
each number contains a special column of brief Notes on Science,
Engineering, Automobiles, etc. A special Department on Patents is
published every second or third number. This contains descriptions and
illustrations of interesting and novel inventions, Personal Notes about
inventors and Legal Decisions in Patent, Trade-mark and Copyright cases,
etc., digested in a popular and readable style. Inquiries in regard to
physics, hydraulics, electricity, etc., are answered free of charge in
our "Notes and Queries Department." We have special correspondents in
various parts of the country, also in London and Paris, who contribute
to our columns weekly.

SUBSCRIPTION $3 A YEAR.

SCIENTIFIC AMERICAN BUILDING MONTHLY

ESTABLISHED 1885

Is a handsomely illustrated architectural journal of interest not only
to professional architects, but especially to those who intend to build
their own houses. _The Building Monthly_

Contains

Illustrations of houses of all sizes and styles, with full plans.

Descriptions of houses illustrated and cost of construction.

Monthly comments on architectural matters.

Talks with artists and architects.

Articles on landscape and domestic gardening.

Fire protection; the household; housing problems; and the country house.

Legal notes of value to Architects and Builders.

Patents of interest to the architect and house owner.

The best examples of interior decoration and furniture.

SUBSCRIPTION PRICE $2.50 A YEAR

THE SCIENTIFIC AMERICAN SUPPLEMENT ESTABLISHED 1876

is a weekly publication of the same size as the _Scientific
American_ and contains articles too long or too technical for the
parent paper. Lectures and Papers read by famous scientists before
learned societies are published in full or in abstract; articles from
foreign papers, otherwise inaccessible to those who read English only,
are translated; and original articles on technical subjects are a few of
the valuable feat