focis principalibusinveniendis. t Ut aggrcgatum femidiametrorum ad al-terutramfemidiametrum, ita altera diameter in^tegra ad diftantiam foci. 2. Vel per diametros i ut aggregatiira dia-metrorum ad alterutram diamctrum, ita altcradiameter ad diflanti^m foci, 5. Yd fi perfemidiametros operatio… … \ m tc E%em- < Sj/jtagmalCaput IX. ETcemfhm KeguU prm^ per /emidiametros & diametrum. Uc aggregatum femjdiam: G H 9. pedum ad femidiam: CH 5. pedum Logarichmi» o. 95414 ■ O. 477^* itaSemidiameter G F ^. pedum ad fpci diftantiam C M, 4. pedura.Logarithmi. i. 07918 — o- ^0106. Sxemplum Kegulae…
Optics, Geometrical · Optical instruments
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