Ko. 133.] 149 



of analysis. Upon enquiry, we found those whom we supposed 

 most conversant with th-e subject, to differ somewhat in regard to 

 it, though pefhaps not essentially. We will here state our best 

 information relati\^e thereto. Those who till the soil are gene- 

 rally very competent to determine whether the lot, field, or farm, 

 is uniform in its texture and composition. When it is so, we 

 would select eight or ten acres, and from these take our samples. 

 We shall consider the surface soil to extend about the usual 

 depth of plowing, say six or seven inches, and if we wish an 

 analysis of surface and subsoil separate, or one only, we should 

 proceed with wheelbarrow and spade to five selected spots in the 

 field, and throw into the barrow a spade full of surface soil, 

 taken to the depth of six inches, from each place. The mass 

 thus collected should be intimately mixed, of which one pint is 

 enough to send to the chemist. For the subsoil, the same quan- 

 tity should be taken from a depth of not less than twelve inches, 

 and treated in the same manner. If the land is composed of 

 soils differing essentially, they must be treated separately in order 

 to obtain useful analyses, a, c. 



INTERNATIONAL EXCHANGES. 



Paris, May 8, 1853. 

 Mr. a. Chandler, 



Secretary rf the Jlmerican Li^tifute, JV. Y. : 



Sir — I have the honor of addressing to you thirty-three volumes 



and pamphlets, relative to industry, agriculture, horticulture and 



statistic?, presented to the American Institute, in the name of their 



Excellencies the Ministers of France and Belgium, and by Mr. 



Henschling, one of the first statistical writers in Europe. 



Allow me, Mr. Secretary, to take this opportunity to express once 

 more my feelings of gratitude for the kind hospitality with which 

 I have always been received by the members of the Institute when- 

 ever I have had the happiness of being present at their meetings, 

 to whicli I am proud to belong as an honorary member. 

 I have the honor to remain, 



Dear sir, your very humble serv't, 



ALEXANDER VATTEMARE. 



