Canary cage with oxygen-cartridge made in England by Siebe-Gormann, found in Australia (used in the Broken Hill Mines)
Canaries have been used in mines to test for gases (dioxide, monoxide). These deadly gases are left behind after a explosion or fire has used up all the oxygen. This cage has its own oxygen cylinder to revive the canary after it has passed out.
preparing to enter the collapsed mine shaft of the Argonaut Mine
An early attemt at a combination Illumination and gas testing device.
illustration: Henry A Pohs, the miners flame light book, Denver, Colorado,1995, p 260
The canary, "Rescuers friend" with oxygen cage.
http://www.karl-heupel.de/
