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Stereoscopic astronomical photograph, Scientific experiment on the Earth’s rotation at the poles

This pair of photographs is meant to show the overlap between the measurement taken in 1903 and that taken in 1906. It comes with a caption which reads : « The pole displacement line is perpendicular to the longest length of this slide. » 70 x 150 mm.
La note de l’expert
Période

19th

Dimensions

70 x 150 mm

Procédé

Stereoscopic

Prix

Vendu / Sold

Sous différents angles

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