[9] These measurements amount to 576 feet; but we fear the Arabian writer was incorrect in his calculations.
[10] Renard, “Les Phares,” p. 16.
[11] Rev. J. Puckle, “Church and Fortress of Dover Castle” (ed. 1864).
[12] Strabo, xiv., p. 364; Pliny, xxxiv. 18.
[13] See Report of the Royal Commissioners on Lights, Buoys, and Beacons, 1861.—Edinburgh Review, Jan. 1862, p. 173.
[14] This proportion will be slightly modified, but not materially, if we deduct the harbour and pier lights from the English, Scotch, and Irish totals.
[15] We refer to the Exhibition of Lighthouse Models in the Industrial Museum.
[16] Stevenson, “On Lighthouses,” pp. 60, 61.
[17] Edinburgh Review, Jan. 1862, pp. 178, 179.
[18] To be more exact than have been the majority of authors who have written on lighthouses, we must add that a small revolving apparatus, with three reverberators (probably with spherical shells), had been planted at the mouth of the port of Marstrand, in Sweden, prior to 1783. The French engineer, however, had thought out the invention for himself, in ignorance that it had been elsewhere realized, and his was the merit of imagining a system so complete and so rational in all its parts, that nothing has since been added to or taken from his conception.