Abstract
I Do not know upon what authority your reviewer of Rankiae's “Rules and Tables” bases his dictum that the r in the rule for the extension or compression of a spiral spring should be to the second power instead of to the third power. Prof. Rankine's view was that it should be r3. I would refer your reviewer to vol. xviii. of the Transactions of the Institution of Engineers and Shipbuilders in Scotland, where be will find, amongst other results of an experimental committee's investigations upon the important question of the loading of safety-valves by such springs, that the third power of the radius or diameter of the spring is also used.
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MILLAR, W. Rankine's “Rules and Tables”. Nature 27, 483 (1883). https://doi.org/10.1038/027483c0
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DOI: https://doi.org/10.1038/027483c0
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