General   (General discussion, talk about anything.)

TTS Canaries were introduce into the mines about 1911 and were used for many years. During my time down the pit only the Mines Rescue used them to practice with and they were fazed out in 1986 due to modern more reliable gas monitors. They used canaries because they were 6 times more sensitive than anything else to the toxic gas.Always wondered how they found it in the 1st place because it is odourless tasteless and you cannot see it