http://book.klll.cc/ebooks/author/47428.opds?sort_order=release_date 2025-11-17T10:33:54Z Books by Draper, Henry Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-17T10:33:54Z https://en.wikipedia.org/wiki/Henry_Draper See also: en.wikipedia 2025-11-17T10:33:54Z https://book.klll.cc/ebooks/53542.opds On the Construction of a Silvered Glass Telescope Henry Draper