Demonstration Eye
notes: label: Description
content: This consists of a hollow ball with a lens at one side and a piece of ground glass at the other. When the lens is held towards an object, an inverted image will be seen on the ground glass. Two other lenses, one concave and the other convex, can be placed in front of the lens in the eye, to demonstrate the effect of near and far sighted vision.
label: Description
content: Ref: E. M. Clarke, <i>Catalogue of Philosophical Apparatus</i> (London, 1842), p. 38.
label: Description
content: Lerebours et Secretan, <i>Catalogue et Prix des Instruments d’Optique, de Physique, de Chimie</i> (Paris, 1853), p. 36.
label: Location
content: Currently not on view
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: Bowdoin College
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.315397
label: accession number
content: 219414
label: catalog number
content: 315397
objectType: label: Object Name
content: demonstration eye
physicalDescription: label: Measurements
content: overall: 21.5 cm x 8 cm x 9.8 cm; 8 7/16 in x 3 1/8 in x 3 7/8 in
label: Measurements
content: overall: 8 1/2 in x 3 3/8 in x 3 1/8 in; 21.59 cm x 8.5725 cm x 7.9375 cm