,,04 CAMPBELL'S SOIL CULTURE MANUAL 



the year 1905, when there were more sub-surface pacKers 

 sold than in all the previons nine years combined. Then 

 the factory was compelled to expand its facilities and the 

 demand continued to increase until the sales for the year 

 1906 were, equivalent to more than twice the total number 

 sold not only in 1905 but from January 1st, 1895, to Jan- 

 uary 1st, 1906. Just before going to press we learn that 

 the orders received at the factory for the month of Jan- 

 uary, 1907, were nearly half as many as the entire sales 

 for 1906. 



There is but one reason for this enormous increase in 

 the sales of the sub-surface packer, and that is, that this 

 new machine has accomplished its new mission by proving 

 through practical demonstrations that the new principle 

 of a thoroughly pulverized and absolutely firm sub-stratum, 

 or root and seed bed, and its perfect connection with the 

 subsoil below, is one of the most vital conditions for suc- 

 cessful crop growing, and the one point to be fully recog- 

 nized in preparing the soil for the purpose of growing large 

 yields of all kinds of cereals. 



An unassuming fellow townsman of mine, Mr. H. W 

 Campbell, has made a discovery worthy to rank him with 

 Watt, Hudson, Eli Whitney and Edison that of to stor- 

 ing up water in the soil to be cultivated as to make a very 

 meager precipitation suffice to grow a crop and that with 

 no irrigation. E. Benjamin Andrews, Chancellor Neb- 

 raska State University. 



