# Key Stone State, No. 18 from the series "American Views, Mammoth Trees, California"

- By: Anthony and Company (American, active 1848–1901)
- Date: 1870/71
- Medium: Albumen print, stereo
- Classification: Photograph
- Dimensions: Each image: 8 × 7.5 cm (3 3/16 × 3 in.); Card: H.: 8.7 cm (3 7/16 in.)
- Culture: United States
- Credit line: Gift of Harold Allen
- Museum: [Art Institute of Chicago](https://www.artic.edu/artworks/143694)
- Rights: [Public domain (CC0)](https://creativecommons.org/publicdomain/zero/1.0/)
- Picture: https://www.artic.edu/iiif/2/30ce21df-05e1-5c2f-49b2-a371b5ae0e91/full/!1920,1080/0/default.jpg
- Who can see it: Kids profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)