Sample of purified graphite from Horicon Mines, U.S.A.
- Made:
- before 1889
This image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseSample of purified graphite from Horicon Mines, Ticonderoga
Science Museum Group
© The Board of Trustees of the Science Museum
Sample of purified graphite from Horicon Mines, Ticonderoga. This is called " Electrotypers' graphite". From the American Graphite Company, New York