{"book":"adl0131","page":297,"text":"کتاب ۲۸۶ مساحت\nساکن باشد چرا که بدرجه ۱/۲ بهر یک طرف نصف النهار مقناطیسی\nنیز سوزن مذکور ایستاده میشود پس از بیان مذکور معلوم شد که قرص\nرا بغیر ۱/۲ حصه درجه باقسیم دیگر تقسیم کردن قرص مذکور فائده مند نیکیا\nو نیز ظاهر شد که زاویه هائیکه مشاهده کرده میشوند در زاویه ہائے\nمذکوره بنسبت ۱/۲ درجه غلطی زیاده واقع نمیشود۔ احتیاط باید کرد\nکه در هر مشاهده سوزن بالکل بغیر ممانعت بطور کامل شور خوردا\nبرود چرا که اگر قرص طرف صندوق مذکور را بگیرد پس سوزن\nاز نصف النهار مقناطیسی بفاصله\nدرجه های بسیار ایستاده میشود۔\n(۲۲۱) زمین ذواربعه الاضلاع را بذریعه (پرزمشک کمپاس)\nبطریق ذیل پیمایش میکنند برنقط الف وب علمها قایم کنید و\nبر نقطه الف سوزن گذاشته ساکن کنید و زاویه ع الف ب\nکه زاویه در میانه الف ب سمت علم ہا و ع الف نصف النهار مقنات\nطیسی","chars":723,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00297.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/297","canvas":"https://afghanpress.org/iiif/adl0131/canvas/297","source":"https://afghanistandl.nyu.edu/books/adl0131/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0131_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."}}