76 



ton's mill in Salem, the cost of which was three cents per lb., 

 and the same quantity applied as in No. 1. 



On lot No. 3 I put the same quantity of bone from Day's 

 Mill in West Boxford, costing four cents per lb. 



Lot No. 4 was manured with compost manure at the rate of 

 SIX cords to the acre, spread on and partly covered with a 

 small plough. I estimated the manure worth $10 per cord 

 when put on. 



Lot No. 5 was manured the same as No. 4, with the addi- 

 tion of a small quantity of bone put in the hill ; each lot con- 

 tained 512 hills one about one-ninth of an acre, and the land 

 is nearly level and of uniform quality. It all received the 

 same care and cultivation during the season. 



No. 1 produced 11 3-4 bushels of ears of good sound corn, 

 and 5 1-2 bushels poor corn — total, 17 1-4 bushels. 



No. 2, 10 bushels good, 5 1-2 poor — total, 15 1-2 bushels. 

 No. 3, 8 bushels good, 6 poor — total, 14 bushels. 



No. 4, 17 1-2 bushels good, 2 poor — total, 19 1-2 bushels. 

 No. 5, 18 1-2 bushels good, 1 3-4 poor— total, 20 1-4 bushels. 



From the above it will be seen that the cost of the manure 

 for No, 1 was $15 per acre, and the yield was at the rate of 

 40 bushels of shelled corn per acre, without the poor corn. 



No. 2, cost of manure, $15 per acre, 35 bushels corn. 



No. 3, cost of manure, $20 per acre, 28 bushels corn. 



No. 4, cost of manure, $70 per acre, 62 bushels corn. 



No. 5, cost of manure, $76 per acre, 65 bushels corn. 



It will be seen from the above that manure for a bushel of 

 corn cost on No. 1, 37 1-2 cents; No. 2, 40 1-2 cents ; No. 

 3, 67 1-2 cents; No. 4, $1.10; No. 5, $1.10 1-2. 



Perhaps I should have stated more particularly the kind of 

 bone used. Mr. Breed's, as he informed me, was the raw 

 bone crushed in a quartz mill. 



Mr. Walton's was made from bones that had been used at 

 the Lowell Print Works, and all the gelatine extracted. 



Mr. Day's had been steamed to extract the gelatine. 



