VACUUM ILLUMINATION AT THE ELECTRICAL EXHIBITION. Formation of Chlorophyl. Fig. IMOORE'S VACUUM TUBE ILLUMINATION AS EXHIBITED IN A MODEL CHAPEL., scientific american, 1898-06-04


VACUUM ILLUMINATION AT THE ELECTRICAL EXHIBITION. Formation of Chlorophyl. Fig. IMOORE'S VACUUM TUBE ILLUMINATION AS EXHIBITED IN A MODEL CHAPEL., scientific american, 1898-06-04


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