Macbeth Daylighting Circular Slide Chart
date: label: date made
content: 1920-1950
name: label: maker
content: Macbeth-Evans Glass Company
notes: label: Description
content: In the first half of the 20th century, electric lighting became commonplace in American stores, factories, and homes. Firms such as Macbeth Daylighting Company of New York City and Corning Glassware of Corning, N.Y., developed special glass filters that transmitted incandescent light with optical properties similar to those of natural light. Macbeth distributed this white paper circular slide chart, which allowed the user to compare the efficiency and color temperature of Macbeth Whiterlite filters and Corning Daylite filters.
label: Description
content: The device is marked: MACBETH DAYLIGHTING CO., Inc. (/) 227–239 West 17th Street (/) New York. It probably dates from between 1920 and 1950. A tan paper envelope is also marked with the company's address.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, New York City
topic: label: Subject
content: Promotional Item
label: Subject
content: Rule, Calculating
label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
content: Slide Rules
creditLine: label: Credit Line
content: Gift of Oscar W. Richards
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1979.3074.01
label: nonaccession number
content: 1979.3074
label: catalog number
content: 1979.3074.01
objectType: label: Object Name
content: slide rule
label: Object Name
content: calculating rule
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 19.1 cm x 14.2 cm x .2 cm; 7 17/32 in x 5 19/32 in x 3/32 in