380 



BOARD OF AGRICULTURE. 



Animal Dust. 



I. — Brighton Abattoir. 

 The sample which served for my examination was collected 

 during the latter part of August, 1874, at the storehouse of 

 an exteusive dealer in fertilizers at Greenfield, Mass. 



Moisture and organic matter, . 

 Ash constituents, .... 

 Total phosphoric acid in ash, . 

 Nitrogen in animal matter, 

 Potassium oxide, .... 



202.8 pounds insoluble phosphoric acid, 

 58.4 < 



97.2 

 10.2 < 



. 65.34 parts. 



. 34.66 " 



. 13.05 " 



. 4.86 " 



. 0.51 " 



Valuation per ton. 



. $12 07 

 phosphoric acid soluble in citrate of 



ammonia, . . . . 7 70 



nitrogen, . . . . . . 29 16 



potassium oxide, . . . 82 



$48 85 



This article sold, according to a statement in the circular 

 from tbe factory, at $47 per ton, and belongs, consequently, 

 — adopting our scale of valuation, — to the better class of com- 

 mercial fertilizers. Comparing, however, the above sample 

 of the Brighton animal dust of 1874, with those mentioned 

 in my previous report, — 



Brighton Animal Dust, 1873. 



Moisture and organic matter, 

 Ash constituents, . 

 Nitrogen in animal matter, . 

 Phosphoric acid in ash, 



79.66 



20.34 



7.14 



8.76 



we notice a remarkable variation in the composition of that 

 fertilizer; for phosphoric acid varies from 8.76 per cent, to 

 13.0 per cent., and nitrogen from 4.86 per cent, to 7.14 per 

 cent. Although it has been shown that the Brighton fertil- 

 izer, tested in 1874, was worth, comparatively speaking, the 

 price asked for it, it is not less plain that it has suffered in 



