What is a working drift or level. Whispering gallery. See under Whispering called?
gallery — (Mining) A working drift or level. Whispering gallery. See under Whispering. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00