%0 Journal Article %T The Sundial of Belogradchik [In Bulgarian] %A Z.K. Hristov %J Venets : The Belogradchik Journal for Local History, Cultural Heritage and Folk Studies %D 2012 %I SCS Consulting Ltd. %X A method of measuring the average sun time with a cylindrical sundial is presented in this article. The innovation represents the use of a gnomon¨Cmemory system, which has a numerical register consisting of information about the time addition necessary for the average sun time to be determined. This information can be found on the register using a moving, opaque, output point (a top of a pointer) and its shadow. This new idea is in a process in realization in Belogradchik. %K Sundial %K Gnomon %K Equation of time %K Zone time %K Local time %K Belogradchik %U http://www.venets.org/getfile.php?id=120