Macbeth Daylighting Circular Slide Chart

Description
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.
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.
Location
Currently not on view
Object Name
slide rule
calculating rule
date made
1920-1950
maker
Macbeth-Evans Glass Company
Physical Description
paper (overall material)
Measurements
overall: 19.1 cm x 14.2 cm x .2 cm; 7 17/32 in x 5 19/32 in x 3/32 in
place made
United States: New York, New York
ID Number
1979.3074.01
nonaccession number
1979.3074
catalog number
1979.3074.01
subject
Promotional Item
Rule, Calculating
Science & Mathematics
Mathematics
Slide Rules
See more items in
Medicine and Science: Mathematics
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Oscar W. Richards

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