The oil-fueled flame was exceedingly smoky, and could easily ignite flammable gasses (mainly methane) found in coal mines ... used to hold oil-wick or carbide mining lamps, mining helmets were used to ...

The coal mines of the Tennessee Coal ... swinging their sharp pick axes and shoveling coal in the flickering light of their gas headlamps. After electricity, they had to avoid touching the ...

I grew up in South Wales and was surrounded by the coal mining industry ... history which fuelled the Industrial Revolution. This lamp, designed to reduce underground explosions which claimed ...