Abstract
A BRIGHT light, easily obtained and sufficient for projections, has frequently been regarded as a desideratum, where it has been impracticable to procure either the electric or the lime-light. The French Minister of Public Instruction lately appointed a special commission to indicate the apparatus most suitable for projection in primary schools; and it appeared that while there was no lack of simple arrangements for the projection proper, the problem of easy production of an adequate luminous source was hardly solved.
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A Non-Electric Incandescent Lamp . Nature 26, 108–109 (1882). https://doi.org/10.1038/026108a0
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DOI: https://doi.org/10.1038/026108a0