In the notice from which the foregoing is extracted, the 

 learned editors enumerate among the most important chap- 

 ters, those on manure, the composition of animal manure, 

 the essential elements of manure, bone manure, the supply 

 of nitrogen by animal matter, mode of applying urine, value 

 of human excrements, &c. 



The Second Part of the work is a masterpiece of con- 

 densed reasoning on chemical transformations, fermentation, 

 decay, and putrefaction, and on contagion, poisons, and 

 miasms. 



From the Farmer's Register, Petersburg, Va., August, 

 1841 ; 



"This work of Professor Liebig has received more re- 

 spectful attention and applause, than any on Agriculture that 

 has issued from the press." "No work have we yet seen 

 that furnished to Agriculturists a more abundant store of 

 scientific facts." " We earnestly recommend to scientific 

 Agriculturists and to Chemists to study Liebig." 



" By the perusal of such works as this, the farmer need no 

 longer be groping in the dark, and liable to mistakes ; nor 

 would the not unnatural odium of farming by the book, be 

 longer existent. 



" In conclusion, we recommend the work to the Agricul- 

 turist and to the Horticulturist, to the amateur florist, and to 

 the curious student into the mysteries of organic life, as- 

 sured that they will find matter of interest and of profit in 

 their several tastes and pursuits." HOVEY'S Magazine of 

 Horticulture , &c., September, 1841. 



" We regard the work of Liebig as a work of extraordinary 

 philosophical acumen, and conferring upon him the highest 

 honor. The more it is examined, the deeper will be the inter- 

 est which it will create, and the stronger the admiration of the 

 ability with which it is written. It is not a work to be read, 

 but studied ; and if further inquiries and experiments should 

 demonstrate, as seems to us from many facts within our own 

 knowledge in the highest degree probable, the soundness of 

 his views, his work, not merely as a matter of the most inter- 

 esting philosophical inquiry, but of the highest practical utili- 

 ty, will be invaluable." North American Review, July, 1841. 



