Glass... is not required for the collection of solar heat. The National Physical Laboratory of Israel... has perfected a highly polished metal surface coated with a molecular-thin black layer of special paint, which absorbs more than 90 percent sunlight. The polished metal radiates very little of the heat it receives. ...A south-facing wall fitted out with these plates would really "drink in" solar heat, windows, or no windows. (Ken Kern)

Glass... is not required for the collection of solar heat. The National Physical Laboratory of Israel... has perfected a highly polished metal surface coated with a molecular-thin black layer of special paint, which absorbs more than 90 percent sunlight. The polished metal radiates very little of the heat it receives. ...A south-facing wall fitted out with these plates would really "drink in" solar heat, windows, or no windows.

Ken Kern

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