Project Gutenberg 2020-10-21 Public domain in the USA. 37 Humphrey, S. D. (Samuel Dwight) 1823 1883 Humphrey, Samuel Dwight ca09005901 A Practical Manual of the Collodion Process, Giving in Detail a Method For Producing Positive and Negative Pictures on Glass and Paper. Produced by Tom Cosmas produced from files generously provided on The Internet Archive. All resultant materials are placed in the Public Domain. en Photography Ambrotype TR Text Browsing: Art & Photography Browsing: Computers & Technology 440553 440560 2024-08-26T08:06:32.151680 2023-09-27T07:53:54.851785 text/html text/html 437851 2020-10-21T11:06:00 text/html; charset=iso-8859-1 1134648 2020-10-21T11:06:04 text/html; charset=iso-8859-1 application/zip 930782 2024-08-26T08:06:42.131670 application/epub+zip 937139 2024-08-26T08:06:34.537664 application/epub+zip 209741 2024-08-26T08:06:32.880670 application/epub+zip 853597 2024-08-26T08:06:47.264651 application/x-mobipocket-ebook 802837 2024-08-26T08:06:40.929675 application/x-mobipocket-ebook 296601 2022-09-28T16:41:26.237352 application/x-mobipocket-ebook 357210 357204 2024-08-26T08:06:30.498722 2023-09-27T07:53:53.477751 text/plain; charset=us-ascii text/plain 356971 2020-10-21T11:06:00 text/plain; charset=iso-8859-1 119246 2020-10-21T11:06:02 text/plain; charset=iso-8859-1 application/zip 18261 2024-08-26T08:06:47.472592 application/rdf+xml 17817 2024-08-26T08:06:33.540663 image/jpeg 2395 2024-08-26T08:06:33.474666 image/jpeg 1135757 2024-08-26T08:06:32.263733 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog