MANURES. 55 



What precise amount of shelled corn this weight of ears 

 would give, I have not determined ; it was, however, quite 

 unripe, and unfit for shelling or use. 



The difference in favor of the bone in the case of No. 1, there 

 being 17 bushels of bone to the acre, is 484 pounds of corn in 

 the ear, more than where no bone ivas used, and 416 pounds 

 more than where half the quantity was used. 



Suppose 70 pounds of corn in the ear, in the state which I 

 found it in at harvest, to make a bushel of shelled corn, then 

 an acre, using 17 bushels of bone, would produce 6^ bushels of 

 corn more than where no bone was used ; and an acre with 8.43 

 bushels of bone would yield 5£ bushels of corn more than where 

 none was used ; and what increases the perplexity, 17 bushels 

 of bone to the acre produces only one bushel of corn per acre 

 more than half that quantity does. 



Now for the cost. A bushel of bone flour will weigh, I 

 believe, 76 pounds, and 17 bushels at three cents per pound will 

 cost $38.76 ; so that 6-f- bushels of corn will cost that sum, viz. : 

 $38.76. For transportation from Boston, it will be perceived, I 

 have reckoned nothing, though fifty cents would be, I think, 

 the trne expense. 



Bone Flour upon English Grass. 



One square rod with bone, at the rate of 18 bushels per acre, 

 yielded 69| pounds of grass cut and immediately weighed, 

 July 9th. The adjoining rod, without bone, cut and weighed 

 on the same day, weighed 73*- pounds. 



The same experiment was made on lower land, some eight to 

 ten rods distant, and cut July 27th. The rod with bone, as 

 before, yielded 33 pounds ; the adjoining rod, without bone, 

 yielded 36 pounds. 



The bone had been applied in both these cases, as I think, on 

 the 28th of May, and I selected lots for the experiment where 

 no difference was perceptible in the height or thickness of the 

 grass. 



On Barley. 



One rod with the bone, 18 bushels to the acre, weighed 20f 

 pounds ; the adjoining rod, with no bone, 30£ pounds. 



The barley was ripe, and was cut and weighed, with the 

 straw, on the 26th of July. I find I have lost the date of apply- 



