http://book.klll.cc/ebooks/subject/39640.opds 2025-11-18T15:35:44Z Books about Mechanical engineering -- History Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-18T15:35:44Z https://book.klll.cc/ebooks/72043.opds Engineering reminiscences contributed to "Power" and "American machinist" Charles T. Porter