Bell Labs' exterior was the first large-scale application of mirrored glass, a product developed specifically for the project. Now common, especially in sunny climates, the glass's inner layer of aluminum film blocks 70 percent of the sun's heat and admits 25 percent of its light.  Photo 1 of 4 in Eero Saarinen's Giant 1957 Masterpiece in New Jersey Restored and Reimagined
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