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One of two Photographs of the Great Circle (side view) designed by Jesse Ramsden and completed by Matthew Berge for the Royal Observatory of Palermo, Sicily.

One of two Photographs of the Great Circle (side view) designed by Jesse Ramsden

1862-1876
One of two Photographs (three-quarter view) of the Great Circle designed by Jesse Ramsden and completed by Matthew Berge for the Royal Observatory of Palermo, Sicily.

One of two Photographs (three-quarter view) of the Great Circle designed by Jesse Ramsden

1862-1876
Photograph of a vertical circle by Ertel at the Pulkovo Observatory, St Petersburg in Russia, 1876.

Photograph of a vertical circle by Ertel at the Pulkovo Observatory

1876
Two Photographs of the Great Circle designed by Ramsden and completed by Matthew Berge at the Royal Observatory of Palermo

Two Photographs of the Great Circle

1862-1876