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This Device Was Used to Resuscitate Canaries in Coal Mines – from til (museumcrush.org)
submitted 10 months ago by intifan
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[–]intifan[S] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 0 fun3 insightful - 1 fun - 10 months ago (0 children)
I thought this was at least a mildly interesting read, and interesting context to the well known phrase, "canary in a coal mine."