An Improved Furnace for the Cupellation of Precious Metals and for Oxydising and Reducing Ores.

摘要

18,149. Laird, D. Sept. 11. Furnaces for laboratory use, for cupelling precious metals and oxidizing and reducing ores. The flames from liquid or gaseous fuel burners m play beneath the hearth e, which is ribbed transversely below, and the products of combustion pass up on each side into the furnace chamber, escaping at j. Cupels are inserted on trays o, Fig. 4, through the front, which is closed by plugs h, i. A shelf p is fitted to facilitate charging &c.