New York State Museum, 61 



Of these the National and the Leicester works are not now in 

 operation, but the officers report that they will be by January, 

 1892. The total capacity of all the factories is, in round num- 

 bers, about 3,000,000 barrels per annum. I should estimate 

 2,000,000 barrels as a fair estimate of the total production of the 

 western New York salt field, especially if the product of the 

 Ketsof mine be included. 



Additional Notes. 



A modification of the vacuum process, as employed in sugar 

 making, is in use at the Duncan works, Silver Springs. The 

 salt obtained is of excellent quality ; fine, loose, and free from 

 moisture. 



Crude petroleum is used as fuel by the Crystal Company. The 

 cost is said to be greater, but the saving in labor is sufficient to 

 make up the deficiency. Others, as the Miller Salt Company, 

 have abandoned its use as too expensive. 



The Standard Company reports the following experiments, 

 with bituminous coal as a source of heat for evaporating brine : 



March, 15 36-100 tons of coal made 170 barrels of salt. 

 January, 14 2-5 tons of coal made 170 barrels of salt. 



