Abstract
LONDON. Physical Society, November 27.—Prof. Rücker, Vice-President, in the chair.—The President (Captain Abney) described and exhibited some apparatus for giving diagrams of the efficiency of a photographic shutter. In addition to the “speed” of a shutter, which is concerned with the interval (T) between the moments when the shutter admits the first and last rays of light, it is most important to know the efficiency of the shutter.
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Societies and Academies. Nature 55, 119–120 (1896). https://doi.org/10.1038/055119a0
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DOI: https://doi.org/10.1038/055119a0