New Facsimile Printing Process. Blue Glass Photography. Fig. 1. .8 1 Contamination of the Air by Artificial Illumination. 8 1, scientific american, 1877-04-07

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New Facsimile Printing Process. Blue Glass Photography. Fig. 1. .8 1 Contamination of the Air by Artificial Illumination. 8 1, scientific american, 1877-04-07

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