VALUABLE TEXT-BOOKS. 



PBINCIPLES OF ZOOLOGY; Touching the Structure, Development, Dig. 

 tribution, and Natural Arrangement, of the RACES OF ANIMALS, living and extinct 

 with numerous Illustrations. For the use of Schools and Colleges. Part I. COM. 

 PARATIVE PHYSIOLOGY. By Louis AGASSIZ and AUGUSTUS A. GOULD. Revised edi- 

 tion, 12ino, cloth, $1.00. 



" It is not a mere book, but a work a real -work in the form of a book. Zoology is an interesting 

 science, and here is treated with a masterly hand. It is a work adapted to colleges and schools, and 

 no young man should be without it." Scientific American. 



" 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 lun- 

 g uige containing so much new and valuable information." PROF. JAJIES HALL, Albany. 



" The best book of the kind in our language." Christian Examiner, 



PBINCIPLES OS 1 ZOOLOGY, PART II. Systematic Zoology. In 

 preparation. 



THE ELEMENTS OF GEOLOGY; adapted to Schools and Colleges. With 

 numerous Illustrations. By J. R. LOOMIS, President of Lewisburg University, Pa. 

 12mo, cloth, 75 cts. 



" It is surpassed by no work before the American public." M. B. Anderson, LL. D., President 

 Rochester University. 



" This is just such a work as is needed for our schools. "We see no reason why it should not 

 take its place as a text-book in all the schools in the land." .A". Y. Observer. 



"Admirably adapted for use as a text-book in common schools and academies." Congregation- 

 alist, Boston. 



ELEMENTS OF MORAL SCIENCE. By FRANCIS WAYLAND, D. D., late 

 President of Brown University. 12mo, cloth, $1.25. 



MORAL SCIENCE ABRIDGED, and adapted to the use of Schools and 

 Academies, by the Author. Half morocco, 50 cts. 



The same, CHEAP SCHOOL EDITION, boards, 25 cts. 



This work is used in the Boston Schools, and is exceedingly popular as a text-book wherever It 

 has been adopted. 



ELEMENTS OF POLITICAL ECONOMY. By FRANCIS WAYLAND, 

 D. D. 12mo, cloth, $1.25. 



POLITICAL ECONOMY ABRIDGED, and adapted to the use of Schools 

 and Academies, by the Author. Half morocco, 50 cts. 



" It deserves to be introduced into every private family, and to be studied by every man who 

 has an interest in the wealth and prosperity of his country. It is a subject little understood, even 

 practically, by thousands, and still less understood theoretically. It is to be hoped this will form 

 j class book, and be faithfully studied in our academies, and that it will find its way into every 

 f nnily library ; not there to be shut up unread, but to afford rich material for thought and discuss 

 eion in the family circle." Puritan Recorder. 



All the above "Works by Dr. Wayland are used as text-books in most of the colleges and higher 

 schools throughout the Union, and are highly approved. 



D" G. fy L. keep, in addition to works published by themselves, an extensive assort- 

 ment of v:orks published by others, in all departments of trade, which they supply 

 at publishers' prices. They invite the attention of Booksellers, Travelling Agents, 

 Teachers, School Committees, Clergymen, and Professional men generally (to whom 

 a liberal discount is uniformly made\ to their extensive stock. Copies of Text-books 

 for examination will be sent by mail or otherwise, to any one transmitting ONB 

 HALF the price of the same. j~r Orders from any part of the country promptly 

 attended to with faithfulness and despatch. (33) 



