Atilla Bir

Prof. Dr., Istanbul Technical University, Electric and Electronic Faculty. This article first published at Prof. Dr. Kazim Çeçen Anisina (Editor: Aslan Terzîoǧlu and Mehmetçik Beyazit, Istanbul 1998, pp. 83-92). Originally published as Atilla Bir, "Principle and Use of Ottoman Sundials", Prof. Dr. Kazim Çeçen Anisina, Edited by Aslan Terzîoǧlu and Mehmetçik Beyazit, Istanbul 1998, pp. 83-92.