Pretty nearly all the cases of poisoning in mines are due to 'white damp.'
But 'white damp' hasn't got any effect on the flame of a safety lamp.
If a bird gets too much 'white damp,' though, he loses some of his value, because he gets immune and can stand almost ten minutes.
From time to time he was seized by convulsive fits; resembling those of epilepsy, and characteristic of white damp poisoning.
Now, 'white damp,' or carbon monoxide, is a horse of a different color.