Description
Silver and copper alloy aural speculum of the type invented by Newburg and afterwards improved by Grüber and Wilde, including a magnifying glass, mirror and two lenses one attached and one loose.
Acknowledgement: © History of Science Museum, University of Oxford, inv.37665
Silver and copper alloy aural speculum of the type invented by Newburg and afterwards improved by Grüber and Wilde, including a magnifying glass, mirror and two lenses one attached and one loose.