http://book.klll.cc/ebooks/subject/35671.opds 2025-08-04T00:38:17Z Books about Photographic chemistry (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-04T00:38:17Z https://book.klll.cc/ebooks/63710.opds A Manual of Photographic Chemistry, Including the Practice of the Collodion Process T. Frederick Hardwich