Monocular Opera Glass
name: label: maker
content: Rubergall, Thomas
notes: label: Description
content: This is a brass instrument with four draw tubes, and ivory around the eyepiece, objective lens and outer tube. The objective lens is achromatic and 1.25 inches diameter. The length overall is 2 inches closed, and 4.5 inches extended. The “RUBERGALL / London” inscription on the innermost tube is that of Thomas Rubergall (fl. 1802–1854), a mathematical, optical and philosophical instrument maker in London.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Science & Mathematics
label: See more items in
content: Optics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.323564
label: catalog number
content: 323564
label: accession number
content: 251552
objectType: label: Object Name
content: monocular opera glass
physicalDescription: label: Measurements
content: overall: 2 3/4 in x 1 3/4 in; 6.985 cm x 4.445 cm