This grass is found quite frequently around barns and compost 

 heaps, as a weed. The analysis of the above sample shows striking- 

 ly the influence of a liberal manuring on the composition of the 

 species of plants, of which it is a variety. 



FERTILIZER ANALYSES. 



192. GROUND HORN. 



Of Perkins & Bradstreet, Dauvers, Mass. 



Sent on for examination by J. J. H. Gregory, Marblehead, Mass. 



Moisture at 100° C, 



Organic and Volatile matter. 



Ash, 



Phosphoric acid, 



Nitrogen in organic matter, 



VALUATION PER 2000 LBS. 



170.6 lbs. nitrogen at 10c. , 

 27.2 lbs. phosphoric acid at4ic., 



$28.28 

 The inferior mechanical condition of the article advises the low 

 valuation of the nitrogen present. 



193. LOBSTER SHELLS. 



Sent on for examination by J. Shedd, 90 Waltham St., Boston, Mass. 



The material sent on consisted of coarse pieces of the shells with 

 meat mass in a dr^^ condition. The large percentage of carbonate 

 of lime present tends to promote a rapid decomposition of the organ- 

 ic nitrogenous matter, and favors thus a speedy action of the lobster 

 shells, when dried and ground before their application. Counting 

 phosphoric acid in the coarsely ground material 4i cts. per pound, 

 and nitrogen 20 cts. per pound, its commercial value would l)e from 

 22 to 23 dollars per ton. 



