RECOMMENDATORY NOTICES. 



** Ruschenberger's Series. These volumes are constructed upon a new 

 and admirable plan, combining great simplicity of arrangement, with a 

 perspicuity and sententiousness of style seldom found in works of this 

 class ; and which has elicited the highest encomiums of upwards of thirty 

 of the leading professors of the country, whose opinions have again been 

 endorsed by most of the public prints." U. States Adv. 



"The developement of the principles of classification, is among the very 

 best we have ever seen. Science is here dressed in her own native sim- 

 plicity and beauty, so that the philosopher may admire, while the child may 

 acquire it. Medical Reporter. 



" It is a choice, and well digested work.". Atlas. 



" An excellent publication adapted to the youthful rriiad, and a great help 

 to the mojre matured," Mercury. 



"The study of Natural History though generally neglected in schools, 

 is of undoubted use : the present work contains a great amount of infor. 

 mation within a small compass, and properly condenses it for the young 

 mind." N. Y. Journal of Commerce. 



" Ruschenberger's Series. The subjects are Well treated, and from the 

 exceeding cheapness, and admirable arrangement of these elementary works, 

 they are well fitted for general use in public schools and academies." 

 New York American. 



" We do not hesitate to say, that this is the best work of the kind and 

 dimensions, that has even fallen under our notice. We hope all will embrace 

 the first opportunity of procuring a copy, as we are sure they will prize 

 it highly." Botanic Recorder. 



" A well digested and carefully arranged abstract of the most interesting 

 parts of Natural Science." Philadelphia Gazette 



" Admirably adapted to convey an elementary knowledge on the subject 

 of which it treats; and will be found an excellent book for the student." 

 Public Ledger. 



"Valuable in every respect, it contains a vast amount of information, 

 condensed into an available form, for the use of schools." Spirit of the Times. 



" Just such a work as is wanted for elementary instruction, in this pleas, 

 ing branch of science." New York Evening Post. 



" We regard this series as eminently useful, supplying adequately the 

 instruction in natural history necessary to a proper school education." 

 North American. 



" It is an excellent little work for the purpose designed, written in a clear 

 and familiar style, and will not fail to facilitate the studies of those who 

 wish to make themselve* acquainted with the subject." Saturday Courier. 



" Admirably adapted for elementary instruction," Saturday Chronicle. 



" We have great pleasure in recommending it as an excellent elementary 

 manual on the subject. " Medical Examiner. 



"Ornithology This book is equal in merit to the first and second, and 

 is a most valuable work. It is intended for the use of schools and acade- 

 mies, and we would call the attention of parents and others to the series of 

 books to which this belongs, assuring them at the same time, that it will 

 answer the purpose for which it is intended, better than any other work of 

 the kind that we ever saw, or, in our opinion, that was ever published in 

 this country. It is divided into questions and answers, contains an exten- 

 sive and valuable Glossary, and is illustrated by eight Plates ; and what is 

 more, the price is so very low that every person can aftord to purchase it. 

 Yoik New Era. 



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