134 



Experiment Station Hejyort. 



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, 12.10 



Total phosphoric acid, 24. .35 



Soluble phosphoric acid, .35 



Reverted phosphoric acid, 6.97 



Insoluble phosphoric acid, 17.03 



Potassium oxide, .14 



Nitrogen in organic matter, .23 



Nitrogen in ammonia salts, .26 



Nitrogen in nitrates, .24 



Total nitrogen, .73 



Valuation per 2,000 lbs., $31 62 



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

 ganic matter ; in particular, upon moist grass lands. 



