Compound monocular body tube on heavy stand with curved cast pillar

Compound monocular body tube on heavy stand with curved cast

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Compound monocular body tube on heavy stand with curved cast
Science Museum Group
© The Board of Trustees of the Science Museum

Compound monocular body tube on heavy stand with curved cast pillar, for aquarium use, invented by Prof. Lacaze-Duthiers, by Nachet, Paris, 1860-1880