Abstract
THE ordinary spherometer has three arms carrying three fixed points, with a point moved by a screw in the centre. This form is an improvement on the original spherometer invented by Andrew Ross, and for which the Society of Arts gave him a silver medal in 1841.
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COMMON, A. A Sensitive Spherometer. Nature 48, 396 (1893). https://doi.org/10.1038/048396a0
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DOI: https://doi.org/10.1038/048396a0