222 European Agriculture and Rural Ecoiiomy. 



REVIEWS. 



Art. I. European Agriculture and Rural Economy from 

 Personal Observation. By Henry Colman. Vol. I. Part 

 HI. pp. 189 to 284. Boston. 1845. 



The contents of this third part are as follows: — XXV. 

 Agricultural Education ; XXVI. General Views of Agricul- 

 tural Education ; XXVII. Influence of Knowledge upon 

 Agricultural Improvement ; XXVIII, Sciences to be taught ; 

 XXIX. Chemical Science ; XXX. Analysis of Soils ; XXXI. 

 Natural Science ; XXXIl. Model Farm ; XXXIII. Experi- 

 mental Farm ; XXXIV. Economical arrangement of the Ag- 

 ricultural College ; XXXV. Plan of an Agricultural Institu- 

 tion for the United States ; XXXVI. Elevation of Agricul- 

 ture as a pursuit and a profession ; XXXVII. Rural Manners 

 in England; XXXVIII. A Pencil sketch ; XXXIX. Life in 

 the Country; XL. Veterinary College; XLL Museum of 

 Economical Geology ; XLII. Chemical Agricultural Associ- 

 ation in Scotland ; XLIII. Chemical Agricultural Lectures ; 

 XLIV. Employment of Agriculturists ; XLV. Guano, 



These subjects are of so general a nature, that with the 

 exception of the last, we shall refer the reader to the book 

 itself. Information on the use and application of guano being 

 sought after by those who are trying this excellent fertil- 

 izer, we make the following extracts relative thereto : — 



" The secret of the extraordinary success of this manure is not yet solv- 

 ed, however nearly a solution may have been approximated. This is evi- 

 dent from the fact that, after the most exact and minute analysis of this ma- 

 nure, conducted w^ith all the skill and science vi'hich can be brought to bear 

 upon it, no one has been able to form an artificial guano with any degree of 

 its efficacy. Chemistry determines with wonderful accuracy its inorganic 

 properties ; but fifty per cent, of it is organic matter, and this being dissi- 

 pated or lost in the process of analysis, nothing is known of it but its abso- 

 lute quantity. Every common farmer knows that horse manure, cow 

 manure, hog manure, sheep manure, are all specifically different, and their 

 effects and uses are different ; and I believe this depends not more upon a 

 difference in their inorganic elements, than upon som.e specific effects of 

 their organic elements ; and though horses, and cows, and sheep, should be 

 fed upon precisely the same food, their excrementilious matter would be 



