12 



246. 247. 



Pounds per hundred. 



Calcium oxide, 32.17 29.15 



Magnesium oxide, 1.40 3.89 



Sulphuric acid, 44.00 31.82 



Insoluble matter, .70 9.25 



The sample (246) contains 94.8 per cent, of gj-psum, and is a fair 

 article. The customary market price in our vicinity is $9.00 per ton. 



This second article (247) sells at $6.00 per ton; its cost corre- 

 sponds well with its percentage of gypsum, — 67. to 68. per cent. 



WOOD ASHES. 



248. Canada Ashes, collected of Mr. Roche, South Deerfield, Mass. 



249. Canada Ashes, collected of A. Montague, Sunderland, Mass. 



250. Ashes, sent on for examination, by fl. C. Haskell, 



Deerfield, Mass. 



251. Ashes, sent on for examination, from Northfield, Mass. 



Moisture at 100° C. 

 Calcium oxide. 

 Magnesium oxide. 

 Potassium oxide, 

 Phosphoric acid, 

 Insoluble matter, 



Samples 248 and 249, are of a fair composition ; 250 contains less 

 potash, and may consist in part of leached ashes ; 251 is a leached 

 ash. Wood ash ought to be bought and sold on guaranty of com- 

 position ; inferior wood ashes are liable to come from all sections of 

 the country. 



C. A. GOESSMANN, Director, 



Amherst, Mass. 



I^P. S. The Bulletins of the Experiment Station will be sent free 

 of charge to all parties interested in its work, on application. 



