Project Gutenberg 2016-11-17 Public domain in the USA. 72 Draper, Henry 1837 1882 On the Construction of a Silvered Glass Telescope Fifteen and a half inches in aperture, and its use in celestial photography Produced by Thiers Halliwell, Chris Curnow and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) en Astronomy Astronomical photography Reflecting telescopes QB Text Browsing: Science - Astronomy Browsing: Science - General 257502 257464 2024-07-22T08:40:34.719719 2023-09-23T07:16:49.061931 text/html text/html 251229 2021-01-24T19:44:56 text/html; charset=utf-8 2528229 2021-01-24T19:44:56 text/html; charset=utf-8 application/zip 2591638 2024-07-22T08:40:41.746162 application/epub+zip 2595121 2024-07-22T08:40:36.642221 application/epub+zip 150646 2024-07-22T08:40:35.756706 application/epub+zip 2680879 2024-07-22T08:40:45.751138 application/x-mobipocket-ebook 2652186 2024-07-22T08:40:40.801201 application/x-mobipocket-ebook 214769 2022-09-24T10:11:55.463512 application/x-mobipocket-ebook 200459 200252 2024-07-22T08:40:33.795718 2023-09-23T07:16:47.808763 text/plain; charset=us-ascii text/plain 200812 2016-11-19T03:30:08 text/plain; charset=utf-8 72065 2016-11-19T03:32:24 text/plain; charset=utf-8 application/zip 17894 2024-07-22T08:40:45.903137 application/rdf+xml 15662 2024-07-22T08:40:35.865693 image/jpeg 2121 2024-07-22T08:40:35.812690 image/jpeg 2582843 2024-07-22T08:40:34.851731 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog