RECOMMENDATIONS TO STOCKHARDT's CHEMISTRY. 



From John A. Porter, Professor of Chemistry applied to Arty in 

 Yale College. . 



"I concur entirely in the views of the work expressed by Professor 

 Horsford in the Introduction, and shall recommend it to those pursu- 

 ing the study of chemistry under my direction." 



From David A. Wells, Practical Chemist. 



" I consider Stockhardt's ' Principles of Chemistry,' as an elemen- 

 tary book, superior to any work of the kind hitherto published." 



" I have carefully studied Stockhardt's Chemistry, and have used it 

 in the instruction of my classes. As a text-book it is worthy of all 

 praise ; far better than any I have examined since the progress of 

 science rendered the Conversations on Chemistry obsolete. The 

 original is the work of a man at once skilful as a teacher, and pro- 

 found in his knowledge of the history and principles of his science, 

 and famiUar with facts and the details of manipulation. The transla- 

 tion is faultless. It has entirely the air of an original ; and in sim- 

 plicity, clearness, and conciseness may be regarded as a model. 



"GEORGE B. EMERSON." 



*' This Chemistry in particular is fitted for those who desire to 

 study chemisiry without the aid of a master, or to get up for them- 

 selves good illustrative chemical experiments. Many of the modes of 

 explanation are singularly happy, particularly those which are em- 

 ployed to elucidate the mysteries of organic chemistry, and the doc- 

 trine of compound atomic groups." — From the London Literary 

 Gazette. 



" An excellent work, preeminently adapted to practical purposes. 

 Not only does it familiarly expound the latest accepted views and dis- 

 coveries, but it is essentially one to make a chemist of the student." — 

 From the Leader. 



" This deservedly popular Chemistry is written in so easy and 

 agreeable a manner, that it must soon be in the hands of every begin- 

 ner of chemistry, and we recommend all such to procure a copy of it 

 at once, and to read it carefully and perform the experiments described 

 in it ; when they have done this, they will have a very good knowl- 

 edge of the science." — From the London Chemist. 



