Way back when, 1950 or so:
I was finishing the wood handles of forest firefighting tools, shovels, axes, brush hooks, McClouds, rakes and the like, with broken glass to get a smooth finish. After that was done I applied linseed oil with a rag to finish the job. The lunch bell rang, I went to lunch and I tossed the wadded up rag down on the wood hose rack where I had been working. Sitting
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Fire/Arson Investigations