Fig. 3. — First photograph ever taken by phosphorescent light. The face is that of Mr. Tesla, and the source of light is one of his phosphorescent bulbs. Time of exposure, eight minutes. Date of photograph January, 1894.
Fig. 3. — First photograph ever taken by phosphorescent light. The face is that of Mr. Tesla, and the source of light is one of his phosphorescent bulbs. Time of exposure, eight minutes. Date of photograph January, 1894.
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