Crossref Citations
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Problems and Solutions.
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Published online by Cambridge University Press: 20 January 2009
This curious device is figured at p. 149 of De Morgan's Budget of Paradoxes, where it is described as a “hollow semi-cylinder, but not with a circular curve,” revolving on pivots. The form of the cylinder is such that, whatever quantity of oil it may contain, it turns itself till the oil is flush with the wick, which is placed at the edge.