{"book":"adl0311","page":67,"text":"جغرافیه طبیعی و افریقا ۶۴\nکنید که عرض البلد یک شهر ۵۵ درجهٔ شمالی و طول البلد آن ۲۰ درجه مشرقی است اوّل خط پنجاه و پنجم عرض بلد را طرف شمال خط استوا وثانیاً نصف النّهار بیستم را طرف مشرق گرینچ معلوم کنید . بر هر جائیکه این هر دو خط یک دیگر را قطع کنند شهر واقع خواهد بود.\nمتوازی های عرض بلد هر قدریکه نزدیک قطبین رسیده بروند کوتاه تر شده میروند و خطوط طول بلد هر قدریکه نزدیک قطبین برسند متقارب شده می روند.\nگره دارای عرض بلد گره دارای طول بلد\nطول بلد و وقت :- میدانید که زمین بر محور خود از غرب بسوی شرق بیک رفتار می چرخد، ازین ظاهر است که مقامها ئیکه طرف مشرق گرینچ واقع اند. نسبت به گرینچ پیشتر در روشنی آفتاب می آیند. و آفتاب بر مقامها ئیکه طرف مغرب گرینچ اند نسبت","chars":668,"image":"https://storage.googleapis.com/adl-page-images/adl0311/00067.jpg","first_page":1,"last_page":125,"title":"Jughrāfiyā-yi ṭabʻī va Afrīqā جغرافياى طبعى و افريقا","permalink":"https://afghanpress.org/book/adl0311/67","canvas":"https://afghanpress.org/iiif/adl0311/canvas/67","source":"https://afghanistandl.nyu.edu/books/adl0311/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0311_download.pdf","rights":{"image":{"statement":"Public domain. NYU states: \"All works presented on this website are, unless otherwise indicated, in the public domain. The images available on this website may be freely reproduced, distributed and transmitted by anyone for any purpose, commercial or non-commercial.\"","uri":"http://rightsstatements.org/vocab/NoC-US/1.0/","holder":"New York University Libraries","source":"https://afghanistandl.nyu.edu/about.html","delivery":"Images are served from a copy mirrored by this project, not from NYU's servers, under the reproduction terms above.","endorsement":"This is an independent project. It is not affiliated with, endorsed by, or reviewed by New York University."},"text":{"statement":"Machine-generated transcription, dedicated to the public domain under CC0 1.0. No warranty of accuracy: see the provenance block on every page.","uri":"https://creativecommons.org/publicdomain/zero/1.0/","holder":"Steps Ventures"}},"provenance":{"text_produced_by":"gemini-3.1-pro-preview","thinking_level":"low","read_completed":"2026-08-09","per_page_confidence":null,"per_page_confidence_note":"Not recorded during the corpus run. No calibrated per-page score exists, and none is estimated here.","human_reviewed":false,"accuracy_context":"Roughly two thirds of characters agree with a modern printed edition of the same text. Much of the disagreement is editorial, not misreading. Treat the transcription as a finding aid and read the page image before quoting.","primary_source":"The page image. The text is an index into it."}}