SECRETARY'S REPORT. 



99 



As good an one as any I have seen, and I think the best, is the 

 one called the Oneida Vat, manufactured by W. Ralph & Co., 

 Utica, N. Y., an illustration of which is here given: 



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The Engraving represents the tin or inner vat raised, and the sides of the outer 

 vat broken out, to show the heater and supports of the inner vat. 



A. Outer Vat which is lined with galvanized sheet iron. 



B. Tin or inner Vat. 



C. Copper Vat heater extending the entire length of the vat, and enclosed in a 



semi-cylindrical galvanized sheet-iron jacket ; the heater surrounded by 

 water, which water also fills the space between the vats. 



