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15 Reseaux plates for measuring astronomical photographs in wooden case

Made by P Gautier in France, circa 1890.
Optical equipment, 15 Reseaux plates for measuring astronomical photographs, glass / silver / asphalt / wood / textile, used at the Sydney and Melbourne Observatories, made by P Gautier and Melbourne Observatory, France and Melbourne, Victoria, Australia, 1885-1895.

Fifteen Reseaux plates in a wooden storage box with a hinged lid. Each Reseau consists of a square glass plate with a grid marked on its surface.
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