GAS-LIME AND WASTE SALT. 



251 



consisted of a coarsely ground mass of white and black par- 

 ticles, and smelt of the product of a dry distillation of coal. 

 One hundred parts contained the following constituents : — 



Calcium oxide (lime) , 23.93 



Sodium oxide, 14.57 



Chlorine, 15.59 



Phosphoric acid, 0.90 



Sulphuric acid, 1.40 



Insoluble in mineral acids, as sand, etc., 11.80 



Moisture at 100° to 110° C, 16.36 



These analytical results leave but little doubt that the fer- 

 tilizer under discussion is, in the main, composed of waste 

 lime, from gas-works, and refuse salt, — about 22 to 23 per 

 cent, of the latter. Farmers can do much better than pay 

 $15 for a mixture of 500 pounds of burnt lime and 480 

 pounds of refuse salt. An article prepared in that way 

 could be furnished at from $5 to $6, and would be decidedly 

 more reliable. 



Sulphate of Ammonia. 



Samples No. I. and II. were obtained from a dealer in 

 Boston ; No. III. from a dealer in Greenfield, Mass. All 

 three samples were of good quality. The supply of the 

 sulphate of ammonia has fallen short of the demand during 

 the past year, causing a considerable advance of its price. 

 At the beginning of the spring it sold at $95 per ton of 

 2,000 pounds, and it rose subsequently to $110 for the same 

 quantity. The price per pound of nitrogen in that form 

 has thus varied from 23.8 to 27 cents. The market value 

 of the sulphate of ammonia depends, to some degree, on its 

 demand in other brauches of industry, where, at times, higher 



