Counter from the U.S. Geological Survey
Counter from the U.S. Geological Survey
Previous
Next
Usage conditions apply
- Description
- This instrument consists of a mahogany case, nailed shut, with two glass windows. Four openings in a brass plate are visible below one of the windows. These windows are marked on the brass 10, 100, 1000, and 10000. There are number dials below them. According to earlier cataloging, the instrument contains an electromagnet and clockwork which operates the counter. Powered by a battery, the device could count numbers of revolutions and similar phenomena. Measuring time with a stop watch, one could calculate velocities.
- A mark at the front of the top of the instrument and on the bottom reads: 39. The U.S. Geological Survey transferred the instrument to the Smithsonian in 1908. It had been used in the Water Resources Branch of the Survey.
- Reference:
- Accession file 48341.
- Location
- Currently not on view
- Object Name
- counter
- date made
- ca 1900
- Physical Description
- glass (overall material)
- mahogany (overall material)
- brass (overall material)
- Measurements
- overall: 7 cm x 14.9 cm x 10.8 cm; 2 3/4 in x 5 7/8 in x 4 1/4 in
- ID Number
- MA.248693
- catalog number
- 248693
- accession number
- 48341
- Credit Line
- Transfer from U. S. Geological Survey
- subject
- Mathematics
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Counters
- Data Source
- National Museum of American History
Nominate this object for photography.
Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.
If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.
