RECOMMENDATORY NOTICES. 



OPINION OF J. HENSHAW BELCHER, ESQ, 



Professor of Mathematicss. U. S. J^Tavy. 



Philadelphia, October 7, 1841. 

 Dr. W. S. W. Ruschenberger, 



Dear Sir^ — In returning my thanks for the copy which I received of your 

 *' First Book of Natural History," allow me to add ray note of praise to the 

 many which have been published concerning it. 



I believe, wherever the subject of Natural History has been introduced 

 in schools, it has universally proved to be the most effectual incitement to 

 the intellectual faculties of young pupils in particular, and to all classes, 

 both interesting and improving. A suitable text-book for schools, upon this 

 subject has long been desired ; the lack of which alone has prevented many 

 teachers from introducing it as a branch of study. I am therefore happy 

 to say, after a careful examination, that this "First Book" of your series 

 upon Natural History is admirably adapted, and the only one suitable, for 

 the study of this subject by youth. It is perspicuous, comprehensive inte- 

 resting and cheap. 



I sincerely hope, for the benefit of education, that your excellent little 

 work will soon be in use by every pupil in this Union. 

 Very trbly yours, &c., 



J. HENSHAW BELCHER. 



OPINION OF SEARS C. WALKER, ESQ. 



Philadelphia, April 15, 1842. 

 Messrs. Turner & Fisher, 



Gentlemen,—! have attentively examined the Second Book of Dr. Rus- 

 chenberger's series of Natural History, and cheerfully recommend it as an 

 excellent text-book upon Mammalia. It is admirably adapted to instruct 

 and please, as well the " children of a larger growth," as of the small. It 

 is concise, lucid, comprehensive, and cheap. 



Yours, respectfully, 



SEARS C. WALKER. 



OPINION OF THE HON. RICHARD H, BAYARD. 



United States Senator from Delaware. 



Washington City, March 19, 1842. 

 Messrs. Turner &, Fisher, 

 Gentlemen, — I have examined the First and Second Books of " Natural 

 History, prepared for the use of Schools and Colleges, by Dr. Ruschenber 

 ger," which you sent to me some time since. The design of the work is 

 excellent and its execution has a corresponding merit. It furnishes the ele- 

 mentary principles of the science of which it treats, in such form as to engage 

 the attention of young persons without oppressing their faculties, and seems 

 to me to be eminently adapted, to the end for which it was composed. 

 Very repectfully, yours, 



RICHARD H. BAYARD. 



