Skip to main content
African American History
National Museum of American History
1 result(s) for
Search term: guid:ark:/65665/ng49ca746b35772704be05315f76fa0b4fa
Photocopy of a Photograph Showing the Crampton Trigonometric Calculating Instrument
This is a photocopy of a photograph of the instrument for calculating all trigonometric functions co-invented by Frank Crampton. It includes a small vernier which is missing from the object. Also included is a business card of the donor.
For related object, see MA.335540.
Currently not on view
Back to top