http://book.klll.cc/ebooks/subject/30670.opds?sort_order=release_date 2025-08-07T08:00:45Z Books about Reflecting telescopes (sorted by release date) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-07T08:00:45Z https://book.klll.cc/ebooks/subject/30670.opds?sort_order=title Sort Alphabetically by Title 2025-08-07T08:00:45Z https://book.klll.cc/ebooks/subject/30670.opds?sort_order=downloads Sort by Popularity 2025-08-07T08:00:45Z https://book.klll.cc/ebooks/53542.opds On the Construction of a Silvered Glass Telescope Henry Draper 2025-08-07T08:00:45Z https://book.klll.cc/ebooks/53494.opds New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. George Calver