License, verbatimCC0
The Smithsonian Institution: Open Access image dedicated to the public domain under Creative Commons Zero (CC0); usage.access=CC0 on the media record itself.
James Henry Moser, Canadian, 1854–1913. Half-tone Engraving: How to Obtain a Patent, Copp & Co. Patent Attorneys, Washington, D.C., 1898. Smithsonian Institution.