Caps served the ancillary use of protecting the miner’s eyes from smoke or soot and their head from small bumps, but its main purpose was as a mount for their lamps. Dunlap's Oil-Wick Cap Lamp,ca.

A strong argument can be made for substituting extra virgin olive oil for butter, cream and margarine in the diet, but it is not clear that it is better for your health than other vegetable oils.

The wick was lit and would burn, using the oil to stay alight, very similar to a much earlier Roman oil lamp. The hook on the side of the lamp was used to put it onto a jacket, hat or piece of ...