PRINCIPLES OF ZOOLOGY: touching the Structure, Development,

Distribution, and Natural Arrangement of the Races of Animals, living and extinct. With numerous Ilustrations. For the Use of Schools and Colleges. Part I., COMPARATIVE PHYSIOLOGY. By LOUIS AGASSIZ and AUGUSTUS A. GOULD. Revised Edition. 12mo, cloth, 1,00.

This work places us in possession of information half a century in advance of all our elementary works on this subject. No work of the same dimensions has ever appeared in the English lan. guage containing so much new and valuable information on the subject of which it treats. – Prof. JAMES HALL.

A work emanating from so high a source hardly requires commendation to give it currency. The volume is prepared for the student in zoological science; it is simple and elementary in its style, full in its illustrations, comprehensive in its range, yet well condensed, and brought into the narrow compass requisite for the purpose intended. - Silliman's Journal.

The work may safely be recommended as the best book of the kind in our language.-- Christian Examiner.

It is not a mere book, but a work - a real work, in the form of a book. Zoology is an interesting science, and is here treated with a masterly hand. The history, anatomical structure, the nature and habits of numberless animals, are described in clear and plain language, and illustrated with innumer able engravings. It is a work adapted to colleges and schools, and no young man should be without it. -- Scientific American.

PRINCIPLES OF ZOOLOGY, PART II. Systematic Zoology, in

which the Principles of Classification are applied, and the principal Groups of Animals are briefly characterized. With numerous Ilustrations. 12mo, in preparation.

THE ELEMENTS OF GEOLOGY; adapted to Schools and Colleges,

with numerous Ilustrations, By J. R. LOOMIS, late Professor of Chemistry and Geology in Waterville College. 12mo, cloth, 1,00.

After a thorough examination of the work, we feel convinced that in all the requirements of a text book of natural science, it is surpassed by no work before the American public. In this opinion we believe the great body of experienced teachers will concur. The work will be found equally well adapted to the wants of those who have given little or no attention to the science in early life, and are desirous to become acquainted with its terms and principles, with the least consumption of time and labor. We hope that every teacher among our readers will examine the work and put the justness of our remarks to the test of his judgment and experience. – M. B. ANDERSON, Pres. Of Rochester University.

This is just such a work as is needed for our schools. It contains a systematic statement of the principles of Geology, without entering into the minuteness of detail, which, though interesting to the mature student, confuses the learner. It very wisely, also, avoids those controverted points which mingle geology with questions of biblical criticism. We see no reason why it should not take its place as a text book in all the schools in the land. -- N. Y. Observer.

This volume merits the attention of teachers, who, if we mistake not, will find it better adapted to their purpose than any other similar work of which we have knowledge. It embodies a statement of the principles of Geology sufficiently full for the ordinary purposes of instruction, with the leading facts from which they are deduced. It embraces the latest results of the science, and indicates the debatable points of theoretical geology. The plan of the work is simple and clear, and the style in which it is written is both compact and lucid. We have special pleasure in welcoming its appearance. - Watchman and Reflector.

This volume seems to be just the book now required on geology. It will acquire rapidly a circulation, and will do much to popularize and universally diffuse a knowledge of geological truths. – AL bany Journal.

It gives a clear and scientific, yet simple, analysis of the main features of the science. It seems, in language and illustration, admirably adapted for use as a text book in common schools and academies; while it is vastly better than any thing which was used in college in our time. In all these capacities we particularly and cordially recommend it. - Congregationalist, Boston.


THESAURUS OF ENGLISH WORDS AND PHRASES. So Classified and Arranged as to Facilitate the Expression of Ideas, and Assist

in Literary Composition. By Peter Mark Roger, late Secretary of the Royal Society, and author of the “ · Bridgewater Treatise," etc. Revised and Enlarged ; with a List of Foreign WordS AND EXPRESSIONS most frequently occurring in works of general Literature, Defined in English, by BARNAS SEARS, D.D., Secretary of the Massachusetts Board of Education, assisted by several Literary Gentleinen. 12mo, cloth. $1.50.

IT A work of great merit, admirably adapted as a text-book for schools and colleges, and of high importance to every American scholar. Among the numerous commendations received from the press, in all directions, the publishers would call attention to the following: "We are glad to see the Thesaurus of English Words republished in this country. It is a most valuable work, giving the results of many years' labor, in an attempt to classify and arrange the words of the English tongue, so as to facilitate the practice of composition. The purpose of an ordinary dictionary is to explain the meaning of words, while the object of this Thesaurus is to collate all the words by which any given idea may be expressed. - Putnam's Monthly.

This volume offers the student of English composition the results of great labor in the form of a rich and copious vocabulary. We would commend the work to those who have charge of academies and high schools, and to all students. — Christian Observer.

This is a novel publication, and is the first and only one of the kind ever issued in which words and phrases of our language are classified, not according to the sound of their orthoga raphy, but strictly according to their signification. It will become an invaluable aid in the communication of our thoughts, whether spoken or written, and hence, as a means of improvement, we can recommend it as a work of rare and excellent qualities. - Scientific American.

A work of great utility. It will give a writer the word he wants, when that word is on the tip of his tongue, but altogether beyond his reach. – N. Y. Times.

It is more complete than the English work, which has attained a just celebrity. It is intended to supply, with respect to the English language, a desideratum hitherto unsupplied in any language, namely, a collection of the words it contains, and of the idiomatic combinations peculiar to it, arranged, not in alphabetical order, as they are in a dictionary, but according to the ideas which they express. The purpose of a dictionary is simply to explain the meaning of words -- the word being given, to find its signification, or the idea it is intended to convey. The object aimed at here is exactly the converse of this: the idea being given, to find the word or words by which that idea may be most fitly and aptly expressed. For this purp, je, the words and phrases of the language are here classed, not according to their sound or their orthography, but strictly according to their signification. – New York Evening Mirror.

An invaluable companion to persons engaged in literary labors. To persons who are not familiar with foreign tongues, the catalogue of foreign words and phrases most current in modo ern literature, which the American editor has appended, will be very useful. — Presbyterian.

It casts the whole English language into groups of words and terms, arranged in such a mana ner that the student of English composition, when embarrassed by the poverty of his vocabulary, may supply himself immediately, on consulting it, with the precise term for which he has occasion. - New York Evening Post.

This is a work not merely of extraordinary, but of peculiar value. We would gladly praise it, If anything could add to the consideration held out by the title-page. No one who speaks or writes for the public need be urged to study Roget's Thesaurus. - Star of the West.

Every writer and speaker ought to possess himself at once of this manual. It is far from being a mere dul), dead string of synonymes, but it is enlivened and vivified by the classifying and crystallizing power of genuine philosophy. We have put it on our table as a permanent fixture, as near our left hand as the Bible is to our right. — Congregationulist.

This book is one of the most valuable we ever examined. It supplies a want long acknowledged by the best writers, and supplies it completely. - Portland Advertiser.

One of the most efficient aids to composition that research, industry and scholarship, have ever produced. Its object is to supply the writer or speaker with the most felicitous terms for expressing an idea that may be vaguely floating on his mind; and, indeed, through the Deculiar manner of arrangement, ideas themselves may be expanded or modified by reference to Mr. Roget's elucidations. - Albion, N. Y.

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