Measuring & Mapping
Where, how far, and how much? People have invented an astonishing array of devices to answer seemingly simple questions like these. Measuring and mapping objects in the Museum's collections include the instruments of the famous—Thomas Jefferson's thermometer and a pocket compass used by Meriwether Lewis and William Clark on their expedition across the American West. A timing device was part of the pioneering motion studies of Eadweard Muybridge in the late 1800s. Time measurement is represented in clocks from simple sundials to precise chronometers for mapping, surveying, and finding longitude. Everyday objects tell part of the story, too, from tape measures and electrical meters to more than 300 scales to measure food and drink. Maps of many kinds fill out the collections, from railroad surveys to star charts.
"Measuring & Mapping - Overview" showing 1 items.
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- The Hersey Manufacturing Company introduced this type of disc meter in 1901. The firm described it as a “positive displacement meter of the nutating type” that was compact, accessible, able “to do a large amount of service at the lowest possible cost, and “adapted for use on all services where accuracy, reliability and durability are required.” This example—a ⅝” meter with a capacity of 20 gallons per minute—was the smallest of several sizes made. The serial number (321,930) dates from 1908.
- Ref: Hersey Manufacturing Company, Hersey Disc Water Meter. Model F Meter (July 1, 1926).
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- Hersey Manufacturing Company
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- National Museum of American History, Kenneth E. Behring Center