They differ from all preceding works of the kind in this, that they exhibit the 

 plurals of all nouns which are not formed by the mere addition of the letter s, 

 and also the participles of every verb now generally used, and unless accompa- 

 nied by a particular caution. No word has been admitted which is not now cf 

 polite or popular use; and no word has been excluded which is required either in 

 epistolatory composition or conversation. 



In giving the above extracts we take occasion to say, that teachers will find the 

 "Ladies' and Gentlemen's Lexicons" works admirably adapted to take the place, 

 with advantage to their pupils, of the different works recently put into their hands 

 under the name of Expositors, &c. 



95=- The above work has been introduced as a Classbook into many of our 

 academies and schools, with great approbation. 



Rusclieiiberger's First Books of Natural History. 



FOR SCHOOLS, ACADEMIES, COLLEGES, AND FAMILIES. 



Vk. RUSCHENBERGER'S ELEMENTS OF ANATOMY AND 



PHYSIOLOGY. 



For the use of Schools and Families; with 45 illustrations. 1 vol. 12mo. 



This is a most valuable work, by Dr. Ruschenberger: and most admirably are 

 .ze plates, representing all the different parts of the body, done. It is cheap; 

 and every parent should place one in the hands of his children. — N. Y. Herald. 



DR. RUSCHENBERGER'S ELEMENTS OF MAMMALOGY. 

 The Natural History of Quadrupeds; for beginners; 75 illustrations. 1 



vol. 12mo. 



This number treats of all animals that in infancy feed on the milk of their 

 mothers, from the human being down to the musquito-catching bat. Like the 

 " First Book," it is divided into Questions and Answers, and a Glossary; and is 

 illustrated by six plates. It is very cheap ; and contains an abundance of useful 

 information. There are thousands of persons in this country, and millions in 

 Europe, who do not know that whales give milk. — New York Era. 



We do not know a more useful set than this promises to be — and IS. — New York 

 Aurora. 



DR. RUSCHENBERGER'S ELEMENTS OF ORNITHOLOGY. 



The Natural History of Birds; for beginners; 81 illustrations. 1 vol. 12mo. 



New York, Feb. 9, 1846. 



Sir — I have received your note of the 3d instant, together with the "Elements 

 of Ornithology," prepared for the use of Schools and Colleges, by W. S. W. 

 Ruschenberger, M. D., &c, and have read the work, in compliance with the re- 

 quest of the American Institute, that I should examine and report upon it. 



I have great pleasure in highly recommending it. To say the truth, although I 

 am somewhat blanched by the hand of time, and have many years been a student 

 of Ornithology, I consider the present the very best introduction to that science 

 that I have ever seen; and I might add as full praise to the other works of the 

 6eries of Ruschenberger's text- books of Natural History, as far as I am acquainted 

 with the subjects they relate to. 



Dr. Ruschenberger has, in giving this series to the public, rendered a benefit to 

 all seekers after science, as both old and young may profit by the well-arranged 

 and valuable information these volumes contain. Your obedient servant, 



To H. Meigs, Esq., JOHN J. AUDUBON. 



Recording Secretary of the American Institute, New York City. 



We wish we could induce our teachers generally to examine this, as well as the 

 earlier works of Dr. Ruschenberger; they are admirably arranged, and just the 

 very books needed for schools. The work before us, on the Natural History of 

 Birds, is an admirable one; and no teacher should neglect to introduce the series. 



Cincinnati Gazette. 

 10 



