The Harrold Exposure Scale

Description (Brief)
Exposure scale for photography. The white backboard carries three dials: yellow, green, and pink. The directions are on the back. There are settings for date and time, condition of sky, and different kinds of plates and films.
Location
Currently not on view
date made
after 1922
maker
Harrold, Elmer
place made
United States: Ohio, Leetonia
Physical Description
cellulose nitrate (overall material)
Measurements
overall: 7 cm x 10 cm; 2 3/4 in x 3 15/16 in
ID Number
2006.0098.0515
accession number
2006.0098
catalog number
2006.0098.0515
See more items in
Medicine and Science: Chemistry
Celluloid
Photography
Data Source
National Museum of American History, Kenneth E. Behring Center

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