Coal mine canary reviving chamber used to resuscitate canaries after showing signs of carbon monoxide poisoning. Early coal miners used canaries into the coal mines to warn them about the presence of harmful gases such as carbon monoxide.
https://diqn32j8nouaz.cloudfront.net...ng_chamber.jpg
Previously:
https://www.homemadetools.net/forum/...287#post138723
https://www.homemadetools.net/forum/...662#post159336
https://www.homemadetools.net/forum/...700#post147868
https://www.homemadetools.net/forum/...923#post137512
https://www.homemadetools.net/forum/...213#post134760
https://www.homemadetools.net/forum/...4401#post79888
