http://book.klll.cc/ebooks/subject/25807.opds 2025-09-13T21:20:17Z Books about Physical instruments (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 2025-09-13T21:20:17Z https://book.klll.cc/ebooks/44019.opds A Course of Mechanical, Magnetical, Optical, Hydrostatical and Pneumatical Experiments William Whiston and Francis Hauksbee