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R. S. Phil. Trans., 1774. Ibid, 1783. Observations on the Spots on the Sun, etc., 4 degrees; London and Edinburgh, 1863. Periodicitat der Sonnenflecken. Astron. Nach. R.S. Phil. Trans. "Researches on Solar Physics," by De la Rue, Stewart and Loewy; R. S. Phil. Trans., 1869, 1870. "The Sun as Photographed on the K line"; Knowledge, London, 1903, p. 229. R. S. Proc., xv., 1867, p. 256.
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