of natural selection as a cause of
the origin of species, he denies that it is the sole cause, yet
maintains that if it could be demonstrated to be the sole cause,
it would in no manner conflict with orthodox belief in the
Scriptures as the revelation of God to mankind. The perfect candor
of the author is one of the marked features of the discussion,
and his style is a model of pure terse English writing, seldom,
if ever, excelled by any scientific writer. The work is an octavo,
most beautifully printed on tinted paper, and illustrated by many
fine wood engravings.

THE ARCHITECT'S AND BUILDER'S POCKET COMPANION AND PRICE BOOK,
Consisting of a Short but Comprehensive Epitome of Decimals,
Duodecimals, Geometry and Mensuration; with Tables of U. S. Measures,
Sizes, Weights, Strengths, etc., of Iron, Wood, Stone, and Various
Other Materials; Quantities of Materials in Given Sizes and Dimensions
of Wood, Brick, and Stone; and a Full and Complete Bill of Prices for
Carpenter's Work; also Rules for Computing and Valuing Brick and
Brick Work, Stone Work, Painting, Plastering, etc. By Frank W. Vogdes
Architect. Philadelphia: Henry Carey Baird, Publisher, 406 Walnut
street. Price by mail, postpaid, $2.

This is a small work, but printed in small type, and containing a
large amount of useful matter, thoroughly indexed for reference;
bound in morocco; and provided with a clasp, so as to be
conveniently carried in the pocket.

GAS SUPERINTENDENT'S POCKET COMPANION for the year 1871. By Harris &
Brother, Gas Meter Manufacturers, Nos. 1115 and 1117 Cherry street,
Philadelphia. Philadelphia: Henry Carey Baird, Industrial Publisher,
406 Walnut street.

We find in this pocket-book much of interest to gas consumers, as
well as to gas makers. The subject of meters is fully discussed.
The work is bound in pocket-book style, in flexible morocco
binding. Price, by mail, postpaid, $2.

* * * * *

BUSINESS AND PERSONAL.

_The Charge for Insertion under this head is One Dollar a Line. If
the Notices exceed Four Lines, One Dollar and a Half per Line will be
charged._

* * * * *

The paper that meets the eye of manufacturers throughout the United
States--Boston Bulletin, $4.00 a year. Advertisements 17c. a line.

Half Interest for sale in established Machinery Depot, new and
second-hand. Steam fitting connected. Small capital,