ADVERTISEMENT. 



The contemplated republication of this work 

 was, several months ago, announced by Messrs. 

 Carey and Hart of Philadelphia, from whose 

 press it would undoubtedly have appeared in a 

 manner acceptable both to the author and the 

 public ; but, on learning the wishes of the 

 author and translator, those gentlemen at once 

 courteously relinquished their undertaking. 



The printing of this edition had been com- 

 menced, and, notwithstanding the wishes of 

 those most interested in the favorable reception 

 of the work had been publicly announced, a 

 reprint from a New York press made its ap- 

 pearance, with all the errors of the English 

 press, and with additional ones. The friends 

 of Science and the admirers of the indefatigable 

 author, will regret, that any occurrence should 

 have diminished the hope, that the reception 

 of the present edition would have afforded to 

 him and the translator, grateful evidence of 

 the value and interest with which the fruits 

 of the profound researches of the former are 

 here welcomed. 



The reception of Dr. Liebig's volume on the 

 continent of Europe, prior to the appearance of 



