460 



BOAED OF AGEICULTURE. 



Ground Bones. 



[Sent on by farmers near Bolton, Mass.] 



[I. Coarse Bones.] 



[II. Fine Ground Bones.] 



Penguin Island Guano, 



[Sent on for examination.] 



Guaranteed composition: Bone phosphate, 51.76 per 

 cent, (equal to 23.07 phosphoric acid) ; ammonia, 1.43 per 

 cent, (equivalent to nitrogen 1.18 per cent.). 



Moisture at 100° C, . 

 Total phosphoric acid,. 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen in organic matter. 

 Nitrogen in ammonia salts. 

 Nitrogen in niti'ates, . 

 Total nitrogen, 



Valuation per 2,000 lbs., 



12.10 



21.35 



.35 



6.97 



17.03 



.14 



.23 



.26 



.24 



.73 



$31 62 



This article deserves a careful trial upon lands rich in or- 

 ganic matter; in particular, upon moist grass lands. 



