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" An experiment using a h2o-stuffed glass sphere was carried out and al-Farisi showed the additional refractions a result of the glass can be ignored in his design.[seventy four][c] As he noted in his Kitab Tanqih al-Manazir (The Revision in the Optics), al-Farisi used a significant apparent vessel of glass in The form of the sphere, which was fill

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