单词 | fondon |
释义 | fondonn. Metallurgy. Now historical and rare. A large copper pan used in the extraction of silver from its ores. ΚΠ 1865 Gazlay's Pacific Monthly June 557/1 At Catorce they have an improved pan, called fondon, made in the same manner, but five feet in diameter, and stirred by copper mullers moved by a mule. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 134 Fondon, a large copper vessel, in which hot amalgamation is practiced. 1922 W. J. Sharwood in D. M. Liddell Handbk. Non-ferrous Metall. II. xxix. 1054 The later fondon had a copper bottom about 6 ft. in diameter and 6 to 8 in. thick, to which wood staves were fitted. 1994 Sci. Total Environment 149 172/2 Modifications of the pan amalgamation processes for dealing with specific ores included the Tina, Fondon, Francke-Tina, Boss, Reese River and Kroehnke processes. This entry has been updated (OED Third Edition, December 2020; most recently modified version published online March 2022). < n.1865 |
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