フォトフォン
91, 1880–1881, pp 595–598, 726, 727, 929–931, 982, 1882 pp 409–412, 450, 451, 1224–1227.
Bell, Alexander Graham. "Le Photophone De La Production Et De La Lumiere". Gauthier-Villars, Imprimeur-Libraire, Paris. 1880. (Note: this is item #26, Folder #4, as noted in "Finding Aid for the Alexander Graham Bell Collection, 1880–1925", Collection number: 308, UCLA Library, Department of Special Collections Manuscripts Division, as viewable at the Online Archive of California)
"Bell's Photophone". Nature Vol 24, 4 November 1880; The Electrician, Vol. 6, 1881, pp. 136–138.
Appleton's Journal. "The Photophone". Appleton's Journal, Vol. 10 No. 56, New York, February 1881, pp. 181–182.
Bidwell, Shelford.