ILLUMINANT • FREE TRANSLATOR.ORG • Definition of Illuminant

... gas was 3s. 6d., or 1d. per hour against 3d. per hour. To this must be added the greatly increased illumination, four to five times, given by the electric light, to the benefit of the work; while this last illuminant also allowed, during the process of manufacture of the sugar, the delicate gradations of tint to be detected; and so to avoid those mistakes, sometimes costly ones, liable to arise through the yellow tinge of gas illumination. This alone would add much to ...

— Scientific American Supplement, No. 288 - July 9, 1881 • Various

... 1878, he telegraphed the news to London and Paris, where, owing to his great reputation, it caused an immediate panic in the gas market. As time passed, and the new illuminant was backward in appearing, the shares recovered their old value. Edison was severely blamed for causing the disturbance; but, nevertheless, his announcement had been verified in all but the question of ...

— Heroes of the Telegraph • J. Munro