Project Gutenberg 2017-06-12 Public domain in the USA. 82 Herschel, John F. W. (John Frederick William) 1792 1871 Herschel, J. F. W. (John Frederick William) Herschel, John Frederick Herschel, John Frederick William, Sir, bart. Herschel, John Preliminary Discourse on the Study of Natural Philosophy Produced by Sonya Schermann, Charlie Howard, 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 Science -- History Astronomy -- History Science -- Philosophy Physics -- History Q Text Browsing: History - General Browsing: Philosophy & Ethics Browsing: Science - Astronomy Browsing: Science - General 720035 720044 2024-08-22T15:42:14.185434 2023-09-23T13:50:24.096787 text/html text/html 707803 2017-06-12T14:54:12 text/html; charset=utf-8 471076 2017-06-12T14:54:20 text/html; charset=utf-8 application/zip 541844 2024-08-22T15:42:24.407405 application/epub+zip 539239 2024-08-22T15:42:15.972452 application/epub+zip 354467 2024-08-22T15:42:15.074428 application/epub+zip 722400 2024-08-22T15:42:30.726884 application/x-mobipocket-ebook 656139 2024-08-22T15:42:23.267442 application/x-mobipocket-ebook 472121 2022-09-25T00:42:04.401941 application/x-mobipocket-ebook 633953 633744 2024-08-22T15:42:12.888450 2023-09-23T13:50:22.804825 text/plain; charset=us-ascii text/plain 634226 2017-06-12T14:54:10 text/plain; charset=utf-8 227429 2017-06-12T14:54:16 text/plain; charset=utf-8 application/zip 19475 2024-08-22T15:42:30.870992 application/rdf+xml 14956 2024-08-22T15:42:15.213500 image/jpeg 2524 2024-08-22T15:42:15.143478 image/jpeg 473491 2024-08-22T15:42:14.249579 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