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.

The inventor uses an additional oil lamp, and a copper or other metallic tube, which is suspended over this last-named lamp, and furnished with reflectors, by which the lard round the wick of the ...