CHEMICAL MANURES. 43 



which will easily change the cost of the bushel from $1.03 to 93 T 9 & - 

 cents. 



I have always told you, the superiority of a high culture depends 

 upon this circumstance that the increase of expense from the use 

 of strong manures was always inferior to the value of the excess of 

 harvest. 



In the first case, where the return was 20 bushels, and the cost 

 $1.03, if we fix the price of sale at $1.16 the bushel, the harvest 

 represents the value of $23.20, and the net profit $2.60 the acre. 



In the second case, despite the increased expense of $10.13, which 

 the excess of straw reduced to $6.22, the harvest was worth $117.84, 

 and the net profit increased to $23.20 instead of $2.60 the acre. 



Another consequence resulting from these facts so little known 

 that it is better to till and manure well than to waste one's efforts and 

 resources over a large surface scantily manured. 



Suppose an agriculturist to have $5700 at his disposal ; if he pro- 

 ceeds as at the institute of Koville, where they spend $57 the acre, 

 he can cultivate 225 acres. What will be the result ? 



Straw, at $4.22 the acre $950 



Grain 22.22 bu. per acre would be about 4550 bu., 



at about $1.17 5320 



Total $6270 



$6270 of produce against $5700 ; profit, $570. With the same 

 capital, if we apply the system of strong manuring, one can cultivate 

 but 153.45 acres instead of 225, but these 153.45 acres will produce 

 $9264.97, instead of $6270. Thus, 



Straw, at, say, $8.02 the acre . $1231.08 



6865 bu. of grain from 44.74 bu. per acre, selling 



at $1.17 8033.96 



Total $9264.97 



which raises the profit from $570 to $3564.97. 



You will remark, gentlemen, there is no hazardous innovation or 

 revolutionary proceeding, but certain ameliorations of which practice 

 begins to gather the fruits. 



I maintain that grain can be raised at 64 to 70 cents per bushel, 

 and I prove it. If it is a revolution, it is at least a revolution of 

 which no one can dispute the benefits, and which will be accom- 

 plished, no matter what opposition; for truth always ends by 

 triumphing over resistance and routine. 



After having clearly showed the most immediate result attained 

 by employing chemical manures, let us prove by facts the exactitude 

 of these indications. 



For example, I will take a continued culture of wheat. 



In a period of four years the mean return obtained the acre was 

 4260 pounds of straw and 44 bushels of grain. I insist upon this 

 result, because I wish to warn you against some dangers in relation 

 to azotic matter. 



When, on the faith of my studies in the laboratory, I commenced 



