You have seen them in antique stores, especially in mining towns: tarnished brass cylinders with a reflective dish on one side and a bracket for clipping them onto a ...

Calcium carbide is created by heating a lime and carbon mixture in an arc furnace to a temperature of between 3,632 to 3,812 degrees. Calcium carbonate is a fairly hard substance that reacts violently ...

After around 1915, miners debated which technology they favored to light their work underground, a carbide lamp or a battery light. Both were superior to candles and oil lamps that would blow out when ...