Introduction to Horology: How Did We Tell Time?

All Bones Considered: Laurel Hill Stories #043: Henry & Thomas Voigt, Isaiah Lukens & Henry Seybert – Tick Tock, Clocks and Watches, part 1, section 1

I talk about timekeeping in Philadelphia, from sundials and hourglasses to the clock on Independence Hall.  Philadelphia has had skilled clock and watchmakers since colonial times.