{"book":"adl0613","page":42,"text":"( 3 )\n\nnuously in view. They should then fasten the other ends\nof their cords to the loops on the handles of their instru-\nments and again face the distant object (Vide Fig. II).\n\nDirections for taking the range of a Stationary\nobject with a 25 yard base.\n\n15.—Observer No. 2's duties:—\n(a) No. 2 looks through his instrument and obtains\ncoincidence between the distant object and the\nivory strip at No. 1's instrument by advancing or\nretiring, i.e., by movements forwards and backwards.\n(b) If the ivory strip appears to be to the left of\nthe distant object, No. 2 will advance; if to the\nright, he will retire.\n(c) Having nearly got the coincidence between the\ndistant object and No. 1's ivory strip, No. 2 will\nadvance his left foot (Vide Fig. IV) and complete\nexact coincidence by a slight movement, backward\nor forward, of his body—always taking care not\nto move his feet.\n(d) When he obtains exact coincidence he will call\n\"on.\"\n\n16.—Observer No. 1's duties:—\n(a) No. 1 facing the distant object, advances his\nright foot well forward and stands as rigidly as\npossible (Vide Fig III) keeping the cord between\nhimself and observer No. 2 slightly stretched.\n(b) Then by working through his instrument, No. 1\nobtains coincidence by turning the drum D.\n(c) When No. 2 calls \"on,\" No. 1 gives the drum a\nfinal turn (if necessary, i.e., if the coincidence is\nnot already complete) in order to obtain more\nperfect coincidence.\n\n17.—The figure thus indicated would mean the range\nin yards.\n\nDirections for taking the range of a moving object\nwith a 25 yard base.\n\n18.—Observer No. 2's duties:—\n(a) If the object be moving from left to right,\nNo. 2 will obtain his coincidence with the distant","chars":1689,"image":"https://storage.googleapis.com/adl-page-images/adl0613/00042.jpg","first_page":1,"last_page":57,"title":"Mīzān al-masāfah مىزان المسافه","permalink":"https://afghanpress.org/book/adl0613/42","canvas":"https://afghanpress.org/iiif/adl0613/canvas/42","source":"https://afghanistandl.nyu.edu/books/adl0613/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0613_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."}}