Two oak galls in a beaker and a jar of iron(II) sulfate, ingredients of iron gall ink. The papers on the table are instructions for making the ink. Photograph taken at the California State Archives, 1020 "O" Street, Sacramento, California, USA.
vlasta2, <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/bluefootedbooby/">bluefootedbooby on flickr.com</a>
CC BY 2.0
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