Abstract
THE ordinary chronograph used in artillery experiments consists of a falling shutter held suspended by an electromagnet whose circuit is broken by the projectile, which cuts a wire in its passage. Other wires are cut at intervals along the path of the projectile, and as each one is cut a knife is liberated which strikes the shutter and imprints a mark upon it. These marks form a record of the speed of the ball in terms of the known speed of a falling body.
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References
Based upon an article in La Nature, pp. 97 and 122, 1898.
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A New Artillery Chronograph1. Nature 57, 368–370 (1898). https://doi.org/10.1038/057368a0
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DOI: https://doi.org/10.1038/057368a0
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