Sentimental coal-miners carried canary resuscitators to revive their feathered lifesavers
by Cory Doctorow from on (#3RKEF)
This Canary Resuscitator was manufactured in the 1920s by Siebe Gorman and Co.; it was carried by miners to revive the canaries that were used from the late 19th century until 1987(!) as early-warning signals for potentially lethal gas leaks. (more")