The aim of this volume is to furnish in a popular and intelligible form a description of the Lighthouse _as it is_ and _as it was_, of the rude Roman pharos, or old sea-tower, with its flickering fire of wood or coal, and the modern Lighthouse, shapely and yet substantial, with its powerful illuminating apparatus of lamps and lenses, shining ten, or twelve, or twenty miles across the waters. The author gives a descriptive and historical account of their mode of construction and organization, based on the best authorities, and revised by competent critics. Sketches are furnished of the most remarkable Lighthouses in the Old World, and a graphic narration is presented of the mode of life of their keepers. CRITICAL NOTICES. "The book is full of interest."--_N.Y. Commercial Advertiser_. "The whole subject is treated in a manner at once interesting and instructive."--_Rochester Democrat_. "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.=