{"book":"adl0613","page":41,"text":"( 2 )\nwaist-belt on the left side, and the reels (of cords)\nhave spring clips by which they can be attached\nto the waist-belts on the right side.\n8.—By means of the telescope A, the observer views the\ndistant object direct through the opening B and the ivory\nstrip on the instrument of the other observer (by double re-\nflection) through the opening C. The flap F with the\nivory strip attached being raised (Vide Fig. I.)\n9.—\"The left\" Mekometer or \"No. 2's\" instrument is\nsimply an improved form of an optical square and can obtain\nexact coincidence with the ivory strip of \"No. 1's\" instru-\nment and the distant object by moving forwards and back-\nwards.\n10.—When \"No. 2\" has obtained coincidence between\nthe distant object and the ivory strip of \"No. 1's\" instru-\nment, then No. 1 can also obtain exact coincidence between\nthe distant object and \"No. 2's\" instrument by revolving\nthe drum D. The range (or the distance in yards) is then\nread directly off the drum D opposite index E. (Vide\nFig. I.)\nGeneral directions for taking any range.\n11.—In order to take the range, the observers take\ntheir instruments out of their cases, screw in the handles,\nfix telescopes, and raise the flaps.\n12.—When the words \"right\" and \"left\" are used to\nindicate the object to be observed, they will be understood\nto mean the object which lies to the right or left front of\nthe observer.\n13.—No. 1 has then to make No. 2 clearly understand\nthe following :—\n1st.—The exact part of the distant object that he is\nto get his coincidence upon, whether moving or\notherwise.\n2ndly.—The length of the base to be utilised, which\nis generally taken at its full length, 25 yards, and\nat others by half or double their lengths called\n\"Half-bases\" and \"Double-bases\" respectively.\n14.—Nos. 1 and 2 will now hook together the catches\nat the ends of their cords and face the distant object (No. 1\non the right side of No. 2). In this manner they should\nboth turn outwards and double about 9 paces each for a\n25 yard base, taking care to keep the distant object conti-","chars":2039,"image":"https://storage.googleapis.com/adl-page-images/adl0613/00041.jpg","first_page":1,"last_page":57,"title":"Mīzān al-masāfah مىزان المسافه","permalink":"https://afghanpress.org/book/adl0613/41","canvas":"https://afghanpress.org/iiif/adl0613/canvas/41","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."}}