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Jabordnick
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Back when I was a youngling, I was down in Delhi, tobacco picking. Our shower consisted of a 50 gallon drum with a faucet and showerhead sitting in the greenhouse. We painted the outside of it black to collect the heat and painted the inside white to radiate it. In retrospect I'm thinking we should have painted both the outside and inside black. I'm just wondering which would have been more efficient?