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[https://archive.org/details/mobot31753002152772/page/56 J. H. Lane (1870)]<br />''On the Theoretical Temperature of the Sun<br /> under the Hypothesis of a Gaseous Mass Maintaining Its Volume<br /> by Its Internal Heat and Depending on the Laws of Gases Known to Terrestrial Experiment''<br />The American Journal of Science and Arts, Vol. 50, pp. 57 - 74