From 1850 until around 1915, miner’s headgear generally consisted of cloth or canvas hats ... in coal mines. These lamps were worn on soft caps that offered little in the way of protection and were ...
From 1850 until around 1915, miner’s headgear generally consisted of cloth or canvas hats ... in coal mines. These lamps were worn on soft caps that offered little in the way of protection and were ...
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