Clavius, Christoph
,
Geometria practica
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GEOMETR. PRACT.
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<
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altitudo A B, ex maiore C D, co-
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106-01
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/106-01
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gnita proponatur addiſcenda, etiamſi baſis B, non
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cernatur. </
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<
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xml:space
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">Concipiatur ducta recta AE, ipſi BD, pa-
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rallela, vt E D, minorialtitudini AB, ſit æqualis. </
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<
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igitur ex duabus ſtationibus in ſummitate maioris
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altitu dinis C D, factis, per problema 3. </
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<
s
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xml:space
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">vel ex dua-
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bus feneſtris, per problema 4. </
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<
s
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xml:space
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">inueſtigetur tam alti-
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tudo C E, quam diſtantia A E, inſpecto@cacumine
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A, ac ſi eſſet ſignum aliquod in Horizonte A E, vi-
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ſum, & </
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<
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">CE, ex tota altitu dine C D, auferatur, reli-
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qua ED, hoc eſt, minor altitudo fiet nota. </
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<
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tia autem AE, inuenta quæſitæ BD, eſt æqualis: </
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proinde DB, cognita erit.</
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">ALTITVDINEM minorem ex maiori incognita, dummodo baſis
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minoris videri poſſit, per Quadrantem explorare. </
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tiam quoque inter duas altitudines coniicere.</
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<
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<
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figura præcedentis problematis. </
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">Et quia baſis B, minoris
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altitudinis ex maiore apparet; </
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">ſi punctum B, ex duabus ſtationibus in ſummitate
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maioris altitudinis C D, factis inſpiciatur, reperietur per problema 3. </
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<
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maior CD. </
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B, ex duabus feneſtris maioris altitudinis C D, inſpiciatur. </
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<
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dine maiori CD, inuenietur minor altitudo AB, vtin præcedẽti problemate tra-
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ditũ eſt. </
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<
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<
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">PORTIONEM altitudinis maioris ex minore altitudine, & </
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portionem ex maiori cognoſcere per Quadrantem.</
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portio A C, maioris altitudinis A B, exquirenda
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ex minore altitudine DE: </
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nis FB, ex altitudine maiore DE. </
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portione C B, inueſtigetur tam altitudo maior A B, quam
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CB, ex minore altitudine DE, per problema 16. </
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<
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ut videlicet D E, cognita fuerit, aut incognita. </
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C B, ablata ex A B, notam relinquet portionem A C, quæ-
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ſitam.</
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<
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vero D E, maior eſt portione F B, explorandaq;
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</
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<
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minore D E, per problema 16. </
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