000 



BOARD OF AGRICULTURE. 



IV. 



Sulphate of Potassa. 



(From a New- York dealer; collected of Mr. F. J. Kinney, Worcester, 'M'agg.) 



Per cent. 



Moisture lost at 100° C 5.00 



Potassium oxide 

 Suljihuric acid 

 Calcium oxide . 

 Insoluble matter 



Xos. I. and II. of the above compounds are fair specimens 

 of their kind. No. III. is apparent!}' a native kainit, con- 

 taining about two-thirds of its potassium as sulphate, and 

 the rest as chloride. No. IV. is a product of manufacture. 

 It contains from three to four per cent of free sulphuric acid, 

 which is less thim is usually met with in this class of articles. 



Wood-Ash, Oswego, N.Y. 

 (Mr. Chittenden, Sunderland, Mass.) 



This is a good quality of its kind. 



Mr. Henr}^ G. Hawes, No. 2 Central Wharf, Boston, Mass., 

 has recently sent to my office a series of samples of German 

 potash-salts (eight in number), which he proposes to sell, 

 with guaranty of composition, in our wholesale and retail 

 market. i\Ir. Hawes states that he has been appoiuted tlie 

 sole agent for the United States for the sale of the potash 

 compounds manufactured under the direction of Dr. A. 

 Frank, director of the " Vereinigte Chemische Fabriken," at 

 Stassfurt, Germany. As I referred in my Second Annual 

 Report on Commercial Fertilizers somewhat in detail to the 

 potash industry at Stassfurt, and described on that occasion 

 some of the principal potash compounds now offered for sale 

 by Mr. Ilawes (see '* Twenty-second Annual Report of the 

 Secretary of the Massachusetts State Board of Agriculture "), 



