The above stated analytical results of " Raw Wool " do not apply 

 to " wool-waste " from factories ; for the latter material is as a rule 

 more or less mixed with foreign substances as sweepings, etc. The 

 nitrogen of wool-waste has varied in my own experience from 6.25 

 per cent, as the highest, to 3.76 per cent, the lowest result. 



The amount of fertilizing material (potash, phosphoric acid and 

 nitrogen) removed from 100 pounds of raw wool in consequence of 

 washing, has been found in a series of tests to be worth at present 

 rates of valuation from 46 to 47 cents. 



43. Nova Scotia Plaster (Gypsum). Collected of 1). A. Horton, 

 Northampton, Mass., by State Inspector. 



C, 



Moisture at 100° 

 Calcium oxide. 

 Magnesium oxide. 

 Sulphuric acid, 

 Insoluble matter. 

 Carbonic acid. 



15.79 per cent. 

 34.29 " 



0.36 " 

 47.14 " 



1.42 " 

 Not determined. 



This gypsum contained a few per cent of calcium and magnesium 

 carbonates, which not unfrequently are associated with it. 



POTASH COMPOUNDS. (44—47). 



44. Muriate of Potash, of Quinnipiac Fertilizer Co., New Lon- 

 don, Ct. Collected of E. T. Sabin, East Amherst, Mass., 

 by State Inspector. 



45.- Muriate of Potash. Collected of G. P. 

 Mass., by State Inspector. 



Smith, Sunderland, 



46. Muriate of Potash, of Bowker Fertilizer Co., Boston, Mass. 

 . Collected by State Inspector. ILU~ ^4" J^l-, 



