846 



BOARD OF AGRICULTURE. 



XXI. 



Stockbridge's Manures ; Potato. 

 (H. C. Comins, Northampton, Mass.) 



Moisture lost at 100° C. " . 

 Total nitrogen 

 Total phosphoric acid 

 Phosphoric acid soluble in water 

 Insoluble phosphoric acid 

 Potassium oxide 

 Insoluble matter, sand, &c. 



Per cent. 



17.49 

 4.42 

 4.04 

 3.77 



.27 

 7.59 



.64 



Valuation per ton of two thousand pounds : — 



88.4 pounds of nitrogen 



75.4 poimds of soluble phosphoric acid . 

 5.4 pounds of insoluble phosphoric acid 

 151.8 pounds of potassium oxide .... 



XXII. 



William L. Bradley^s XL Superphosphate. 

 (H. Phelps, Northampton, Mass.) 



Oi'ganic and volatile matter 

 Ash constituents 

 Moisture lost at 100° C. . 

 Total nitrogen .... 

 Total phosphoric acid 

 Phosphoric acid soluble in water 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Insoluble matter, sand, &c. 



$38 82 



Per cent. 



59.96 

 40.04 

 22.82 



2.99 

 12.20 



8.44 

 .62 



3.14 



2.93 



Valuation per ton of two thousand pounds : — 



59.8 pounds of nitrogen 



168.8 pounds of soluble phosphoric acid . 

 12i4 pounds of reverted phosphoric acid . 

 62.8 pounds of insoluble phosphoric acid 



Cotton-Dust. 

 (Sent by Hon. F. W. Bird, Walpole, Mass.) 



Organic and volatile matter 

 Ash constituents 

 Moisture lost at 100° C. . 

 Nitrogen in organic matter 

 Phosi)horic acid in ash 



111 96 



21 10 



1 12 



3 77 



$37 95 



Per cent. 



49.07 



50.93 



34.46 



.50 



.21 



