Note 411 — Chapter XXIII · THE CARBONIFEROUS SYSTEM OF BRITAIN AND ITS VOLCANIC RECORDS
Reading edition
Trans. Roy. Soc. Edin. vol. xxii.
[412] Ibid. vol. xxix. (1879), p. 437.
[413] Quart. Journ. Geol. Soc. xlviii. (1892), p. 104. This summary, with additional details and illustrations, is embodied in the text.