ocrat_.

"The illustrations are full, and excellently engraved."--_Phil. Morning
Post_.

=Acoustics.=

THE WONDERS OF ACOUSTICS; or, THE PHENOMENA OF SOUND. By R. RADAU. With
110 illustrations. One volume 12mo. _Printed on tinted paper_ $1 50

_For specimen illustration see page 27._

No overweight of technicalities encumber the author's ample and
exceedingly instructive disquisition; but by presenting the results of
curious investigation, by anecdote, by all manner of striking
illustration, and by the aid of numerous pictures, he throws a popular
interest about one of the most suggestive and beautiful of the sciences.
The book opens with an attractive chapter on "Sound in Nature," in which
the language of animals, nocturnal life in the forests, and kindred
subjects are discussed. Among the topics treated of later in the work
are such as "Effects of Sound, on Living Beings," "Velocity of Sound,"
"The Notes," "The Voice, Music, and Science." This volume forms a
valuable addition to the series.

=Bodily Strength and Skill.=

WONDERS OF BODILY STRENGTH AND SKILL. Translated and enlarged from the
French of GUILLAUME DEPPING, by CHARLES RUSSELL. Illustrated with
seventy engravings on wood, many of them full page. One vol. 12mo.
_Printed on tinted paper_ $1 50

_For specimen illustration see page 28._

This is decidedly one of the most interesting volumes of the Library of
Wonders. In it the author has collected, from every available source,
anecdotes descriptive of the most remarkable exhibitions of Physical
Strength and Skill, whether in the form of individual feats, or of
national games, from the earliest ages down to the present time. The
author has simply endeavored to make a collection of "Wonders of Bodily
Strength and Skill," from the Literature of all countries, and if any of
them may be assigned to the region of the improbable, he most
respectfully refers doubting inquirers to the original sources. The
grace and skill displayed in the illustrations, which are numerous and
striking, make the volume singularly attractive.

=Balloons.=

WONDERFUL BALLOON ASCENTS. From the French of F. MARION. With thirty
illustrations on wood, many of them full page One volume 12mo. _Printed
on tinted paper_ $1 50

_For specimen illustration see page 29._

This volume gives an interesting history of balloons and balloon
voyages, written in an exceedingly readable and graphic style, which
will commend itself to t