Abstract
THE lecturer began by observing that no real advance could be made in any branch of physical science until practical methods for a numerical reckoning of phenomena were established. The “scale of hardness” for stones and metals used by mineralogists and engineers was alluded to as a mere test in order of merit in respect to a little understood quality, regarding which no scientific principle constituting a foundation for definite measurement had been discovered. Indeed it must be confessed that the science of strength of materials, so all important in engineering, is but little advanced, and the part of it relating to the quality known as hardness least of all.
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Electrical Units of Measurement 1 . Nature 28, 91–92 (1883). https://doi.org/10.1038/028091a0
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DOI: https://doi.org/10.1038/028091a0
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