Boller and Chivens designed and manufactured.
Assembled in #2 pit of Boller and Chivens telescope assembly building.
To learn more about Spectroheliographs, visit http://en.wikipedia.org/wiki/Spectroheliograph
Boller and Chivens designed and manufactured.
Assembled in #2 pit of Boller and Chivens telescope assembly building.
To learn more about Spectroheliographs, visit http://en.wikipedia.org/wiki/Spectroheliograph
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