Abstract
THERE are few physical problems of greater immediate and obvious practical importance, than that involved in the measurement of air pressures under complex conditions of motion, and there are few problems which present greater difficulty, or—what is worse—uncertainty. It may be comparatively easy to obtain under any particular set of circumstances evidences of barometric variation by means of some indicating instrument, apparently suitable for the particular purpose, but it is a very different matter to decide how far the quantitative result is unaffected by actions set up by the instrument itself. Thus the record of the pressure plate gives information which is of little, if any, value in relation to the distribution of pressure over a large building; while the barometer itself is capable of giving misleading indications, whether it is too effectually protected from external influences, or too much exposed.
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References
"A Method of Measuring the Pressure at any Point of a Structure, due to Wind blowing against that Structure." By Francis E. Nipher . (Transactions of the Academy of Science of St. Louis, vol. viii. No. 1.)
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A Method of Measuring wind Pressure. Nature 57, 449–450 (1898). https://doi.org/10.1038/057449a0
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DOI: https://doi.org/10.1038/057449a0