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 ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This cotton miner’s cap has a leather ...

Lighting has played a critical role in the safety of underground coal and metal mining for several thousand years. Challenges in an underground mine environment include dust, confined spaces, surfaces ...

We want to hear about what you collect and why. Email Cindy Hval at [email protected] or call Kimberly Lusk at (509) 459-5457. The mining ore cart next to his garage offers a clue to what Bob Weldin ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This lamp was made by the Dewar ...