RECOMMENDATORY NOTICES. 



OPINION OF ISAAC LEA, ESQ. 



Philadelphia. Feb. 10, 1842. 

 Dr. Ruschenberger. 

 Dear Sir, — I have examined with great interest, the First and Second of 

 your " Series." The simplicity of arrangement, and concise manner of 

 treating the subjects, admirably adapt these volumes to the object you had 

 in view — enforcing facts on the young and enquiring mind. A knowledge 

 of the principal functions of the body should be early inculcated, and some 

 acquaintance with Natural History has now become indispensable even 

 to a moderate education. 



I trust that you will be induced to finish the " Series," believing it a 

 desideratum in instruction. 



I am very sincerely, yours, 



ISAAC LEA. 



OPINION OF ABRAMAM L. COX, M. D. 



New York, Jan. 1842. 

 Messrs. Turner & Fisher. 

 Gentlemen, — After a careful examination of the " Second Book of Natural 

 History," from the text of Edwards and Comte, I am entirely satisfied of 

 its high character for usefulness as a school book, and that it fully sustains 

 the excellent reputation already acquired by its predecessor. 



The questions at the foot of the page, and the glossary at the end of the 

 book, increase its value as a work of instruction for youth. It is terse, full 

 and perspicuous. 



It fulfils its professions, and cannot be surpassed as an efficient and appro- 

 priate guide to the young student. 



Those who originally prepared it as well as its translator and editor have 

 performed an invaluable service to society, and one not the less honourable as 

 an effort of intellect and science devoted to the service of the young. 



It is a work of real met it, without pedantry or pretension, and I sincerely 

 hope it may be as generously patronised and highly appreciated as it deserves. 

 With my best wishes for your success, I am, very respectfully 



Yours, ABR'M L. COX. 



OPINION OF C. R. OILMAN. 



Professor of Obstetrics, and the Diseases of Women and Children, in the 

 College of Physicians and Surgeons in the city of New York. 



New York, Jan. 19th, 1842. 

 Messrs. Tttrner & Fisher. 

 Gentlemen, — I have received the copy of Dr. Ruschenberger's Mammalogy, 

 the second of his useful series of works on Natural History. The multifarious 

 engagements which press upon me at this season of the year, have prevented 

 me from giving it a very thorough examination ; from what I have seen of it, 

 however, I doubt not that it will fully maintain the character which the first 

 so universally obtained. Having a parent's interest in the subject of educa- 

 tion, I rejoice that the rising generation are to have the benefit of so excellent 

 a collection of works on the important and interesting subject of Natural 

 History, as Dr. Ruschenberger's series promises to be. 



Accept, gentlemen, ray best wishes for the success of your undertaking 

 and believe me. 



Yours, &c. 



C. R. OILMAN. 



