## Full text: Clavius, Christoph: Gnomonices libri octo, in quibus non solum horologiorum solariu[m], sed aliarum quo[quam] rerum, quae ex gnomonis umbra cognosci possunt, descriptiones geometricè demonstrantur

LIBER SEPTIMVS. Supputato quoque in eodem arcu ſurſum verſus complemento inclinationis, ducatur ex β, per fi-
nem ſupputationis recta (quę perpendicularis erit ad β D,) ſecans C D, in C, puncto, per quod
recta C E, ducta ad C D, perpendicularis erit linea horizontalis.

### 521.1.

Conſtructio ho
rologii Aſtrono
mici à Verticali
declinantis, &
fimul inclinati.
Horizontalis li-
nea.

DEINDE in recta C D,
ſumpta recta C F, ſurſum, aut
deorſum verſus, æquali ipſi
C β, deſcribatur ex F, verſus
C E, arcus circuli, in quo nu-
merata à recta C D, declina-
tione plani à Verticali circu-
lo, (quam in prima figura po-
nimus eſſe à mer. in ortum
gr. 40. In ſecunda à mer. in
occaſum grad. 20. In tertia à
mer. in ortum gr. 45. In quar-
ta à Sept. in occaſum gr. 20. In quinta à Sept. in ortum gr. 60. & in ſexta à Sept. in ortũ
gr. 30.) ad dexteram quidẽ,
ſi planum à meridie in ortum
deflectit, vt in figura 1. & 3. vel à Septentr. in occaſum, vt
in quarta figura, ad ſiniſtram
autem, ſi planum declinat à
meridie in occaſum, vt in ſe-
cunda figura, vel à Septent. in
ortum, vt in 5. & 6. figura, du-
catur ex F, per finem numera-
tionis recta ſecans horizonta-
lem lineam C E, in E. Nam
recta D E, per D, & E, in vtrã-
que partem eiecta dabit lineã
meridianam, ſeu horam 12. à mer. vel med. noc Supputato quoque in eodem arcu à recta C D, in contrariam partem comple
mento declinationis, ducatur ex F, per finẽ ſupputationis recta (quæ ad F E, perpendicularis erit)

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