Recent: Election Night RCS Photos Space Stamps Fireworks Long Black Curly Eyes Nixie Tubes Memory Scavengers Nightshade Cobras Magical Feedback of Oz Harp Case Reading List 2023 Moonrise Local Wildlife Centipede Recent Photos Mouse Teeth Reading List 2022 Connection Machine Photo |
I spent yesterday photographing a precision clock that
was installed at Ladd Observatory in 1902, while it was being
reassembled after being sent out for repairs. At the time, this
was one of the most accurate clocks in the world. NIST was using
the same model as their primary time source.
http://en.wikipedia.org/wiki/Riefler_escapement
|
