Template:Did you know nominations/William Francis Channing
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Revision as of 19:15, 10 October 2015 by imported>Doug Coldwell (New DYK nomination)
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William Francis Channing
- ... that William Francis Channing invented the first citywide electric fire alarm system?
Created by Doug Coldwell (talk). Self-nominated at 19:14, 10 October 2015 (UTC).