Clavius, Christoph
,
Geometria practica
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GEOMETR. PRACT.
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quot inregula A F, includuntur inter centrum A, & </
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rea quod eandem proportionem habet ſegmentum regulæ A F, vſque ad in-
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teruallum rectæ diuiſæ, ad ſegmentum ejuſdem regulæ vſque adinteruallum
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alterius lineę, quam interuallum rectę diuiſæ ad interuallum alterius lineę ha-
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bet, &</
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<
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eſſet interuallum inter 100. </
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<
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<
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<
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xml:space
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gmentum transferendum in inſtrumentum, vt dictum eſt. </
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<
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rarectarum diuiſa ſit in 50. </
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<
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inter 50. </
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<
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<
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<
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xml:space
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100. </
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<
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<
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tum ęquale interuallo 30.</
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teruallum inter 100. </
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<
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quo modo ac-
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cipiantur re-
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ſpectu ſin{us}
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toti{us} 100.</
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tum ęquale interuallo 40.</
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<
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<
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<
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<
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ſi in Tangentibus nouę deſcriptionis horologiorum (vt hu-
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ius inſtrumenti vtilitatem quo que in deſcribendis horologijs aperiamus) ſi-
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nus totus ſtatuatur 100. </
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<
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natur ęquale, capie@@s commodiſsime quamcumque Tangentem tabulę
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in noua deſcriptione p@ſitę, ſi ea, abiecta prima tantum figura ad dexteram,
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minor fuerit quam 100. </
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<
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ea in tabula eſt 838. </
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</
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<
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<
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maior eſt, quam 5. </
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<
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{8/1
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0} hoc eſt, pluſquam @. </
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<
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<
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lo minus, vt dictum eſt, habebitur Tangens quęſita: </
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<
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bula, abjecta prima figura ad dexteram, maior fuerit quam 100. </
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<
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eſt Tangens per denas, at que vnitates expreſſa, relictis centenis, & </
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<
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genti poſtea ſinus totus adij ciendus eſt toties, quoties vnitas in centenis re-
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peritur. </
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<
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eſt 2583. </
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<
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tus F G, bis adij ciendus, & </
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ſi rectam K L, partium 11. </
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<
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<
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part{es} quo mo
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do capiantur,
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etiamſi in in-
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ſtrumento cõ-
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tineantur tã-
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tum part{es}
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100.</
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bere velimus accipere poterimus ex data recta partes milleſimas. </
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<
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enim ita ſe habet linea K L, ad vnam eius partem, vt portio A 10. </
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<
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decem partium ad vnam, cum vtrobique proportio ſit decupla; </
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<
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tando quo que K L, ad A 10. </
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<
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ipſius A 10. </
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<
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">Cum ergo K L, contineat ipſam A 10. </
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<
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<
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ipſius decimam, (ſumpta eſt enim K L, partiũ 11. </
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<
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<
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<
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tinebit quo que vna particula ipſius K L, vnam particulam ipſius A 10. </
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<
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& </
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<
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<
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">Atque adeo duę illius includent duas hu-
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ius cum {2/10}. </
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<
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">& </
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<
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">tres continebunt tres cum {3/10}. </
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<
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<
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">Quare ſi verbi
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gratia deſiderentur {87/1000}. </
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<
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<
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inſuper {7/10}. </
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<
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">ſequentis partis nonę, cum decima pars vnius centeſimę ſit {1/1000}.
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</
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quodita fiet. </
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<
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<
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">partes ex KL, eęque in A F, transfe-
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rantur ex quavis
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parte. </
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<
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">Nam pes circinimobilis auferet {7/10}. </
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<
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">ex octaua parte
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poſt pedem circini immobilem, quę particula in nonam partem eſt transfe-
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renda. </
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<
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">Ita enim, cum octo partes complectantur {80/10}. </
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<
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