C1880
The Royal Observatory, Greenwich Measuri…
Artist:
W.Basslett Murray
The Royal Observatory, Greenwich began daily measurements of sunshine hours in the 19th century using Campbell-Stokes sunshine recorders. This instrument features a glass sphere that acts as a lens, scorching a burn mark onto a card to measure sunlight intensity. … Read Full Description
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S/N: AST-09–191974
Categories: Australian – Mueller
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