These contributions are part of the results of the author's visit to Iceland in June 1860, and will be found embodied in his Paper “On the Eruption, in May 1860, of the Kötlugjá Volcano, Iceland,” in the “Edinburgh New Philosophical Journal” for January 1861, page 6, with a map (Plate II.), “Illustrative of the Physical Geography of that part of the South of Iceland in which Kötlugjá is situated.”