Miners did [0] - as a mount for lamps as well as for protection against bumps. Tangentially, some tank crews wear helmets inside their tanks for protection to a

Miners did [0] - as a mount for lamps as well as for protection against bumps. Tangentially, some tank crews wear helmets inside their tanks for protection to avoid head injuries while bouncing around on terrain. [0] https://americanhistory.si.edu/collections/object-groups/mining-lights-and-hats https://americanhistory.si.edu/collections/object-groups/min...