be $295.00 ; without bone, $232.00 ; cost of 39 bushels of 

 the bone, $88.92; thus the 6 3-10 tons excess, with bone, cost 

 this sum, $88.92. 



An answer to all this may be urged, viz : — that a part, per- 

 haps a larger part, of the strength of the bone will be avail- 

 able next year, and perhaps for a still greater length of time. 

 I hope it will prove so, but where I used it last year, I am 

 unable to perceive any manifest traces of it. 



On the whole, the results, so far as my experience goes at 

 present, are as astounding as they are painful and unaccount- 

 able. Last year I was led to think and say the bone had 

 done nobly for onions, but I now strongly suspect I was de- 

 ceived, and attributed an apparent result to a wrong cause. 



Were this the time and place for argument, I should urge 

 the importance of an analysis of the soil, as well as of the 

 stimulant to be applied to it, lest it should appear that it was 

 as well supplied with a given element as the prejmred manure 

 itself, and a consequent failure should be inevitable. But the 

 field is as limitless as it is important, and I leave it to abler 

 hands. 



STATEMENT OF CHARLES P. PRESTON. 



To THE Committee on Manures : 



Having heard from persons whom I supposed to be good 

 authority, that is, those who had experimented with bo?ie as a 

 mamirc, that it was a very valuable fertilizer, for corn, as well 

 as other crops, and having also the opinion, that our soils are 

 generally deficient in yhospJiatcs, I bought last spring five bar- 

 rels of bone mani:re — four of Day's manufacture, and one 

 from the firm of Devereux 8c Co., Boston. 



I applied it at the rate of 300 pounds per acre to two acres 

 of corn land, fi'st having spread 10 ox cart loads of good 

 barn manure to the acre on the green sward and turned it 



