Sand Glass
notes: label: Description
content: A glass of this sort would have been used, in conjunction with a log-line, to determine the speed of a ship. In this example, the sand passes from the upper vessel to the lower in 28 seconds.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Navigation
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content: Measuring & Mapping
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.337068
label: accession number
content: 1980.0229
label: catalog number
content: 1980.0229.01
objectType: label: Object Name
content: half-minute glass
physicalDescription: label: Measurements
content: overall: 4 in x 2 7/8 in; 10.16 cm x 7.3025 cm
label: Measurements
content: overall: 4 in x 2 13/16 in; 10.16 cm x 7.14375 cm