Benedetti, Giovanni Battista de
,
Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]
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IO. BAPT. BENED.
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et
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quibus mediantibus cognoſcitur longitudo vmbræ gnomonis hoc eſt
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.</
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azimut Solis, nihil aliud ſigniſicare volo, niſi angu-
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lum, quem terminat linea azimutalis horologij, hoc eſt vmbra gnomonis cum li-
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nea meridiana, ſeu cum verticali in ipſo plano horologij. </
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<
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les ſunt ijs, qui in triangulo conſtituto ex
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ex
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& ex
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reperiuntur, cuius qui
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dem trianguli, angulus puncti
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rectus eſt, angulus verò terminatus ab
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et
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il
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le eſt quem conſtituit azimut cum verticali, vel ipſi æqualis, vt coalternus, reliquus
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verò in
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ille eſt
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azimut facit
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meridiano, vel ipſi ęqualis vt coalternus.</
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<
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">Vnde quotieſcunque volueris in aliquo plano, orizonti parallelo, lineas hora-
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rias ducere, iudico optimum fore ſi ſeparatim deſignatæ fuerint hæ tres figuræ, hoc
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eſt analemma meridianum, vel azimutale, vt ita dicam, </
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pro tropicis, vt ego feci cap .51. meæ gnomonicæ, quæ duæ figuræ,
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pro omnibus horologijs, tam ori-
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zontalibus quam muralibus, non
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tamen omninò, ideo pro orizon-
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talibus, tertiam figuram ſeparatam
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deſignaui, quę erit circulus
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K.</
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eiuſdem magnitudinis cum ana-
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lemmate, in quo, ductis duobus
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dia metris inuicom ad rectos, quo-
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rum vnus
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ſignificet orizon-
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talem lineam, reliqua verò
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ticalẽ</
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, ducatur poſtea
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tam di-
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ſtans ab
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quanta eſt longitudo
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gnomonis horologij orizontalis,
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cogitemus, </
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">deinde hunc circulum
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communem eſſe omnibus azimut
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necnon plano horologij, in cuius
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circunferentia à puncto
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nadir ip-
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ſius zenit, accipiantur arcus æqua-
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les ijs ipſorum azimut, quos termi-
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nat zenit, & ipſi almicantarat, vt
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exempli gratia, accipiemus arcum
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<
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æqualem arcui
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ipſius ana-
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lemmatis, ducta poſtea linea occul
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ta
<
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ſignabimus azimutalem
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in puncto
<
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>.a.</
var
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vbi hæ duæ lineæ ſein
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uicem ſecant, & ſic habebimus iu-
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ſtam
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ipſius vmbræ gno
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monis
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tali hora, </
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zontali
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ſumatur
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à centro
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o.</
var
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ęqualis ei quę in analemate repe
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ritur, quæ vna portio eſt commu-
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nis ſectionis meridiani cum almi-
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cantarat, terminata ab axe orizon
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tis, & à diametro paralleli. </
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