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

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133113LIBER PRIMVS.

EADEM induſtria conſtruximus ſex ali{as} tabul{as}, vt earum inſcriptiones indicant, vt cognoſca-
11Tabulæ arcuu
diurnorum, no
cturnorumq́ue
horarum 6, 18.
& 12 ex qu@bus
intelligitur, quę
nã horæ à mer.
uel med. noc &
quæ inęquales
ſe mutuo in his
arcubus diurnis
interſecent. tur, quęnam horę à meridie, vel media nocte, & quæ inæquales ſe mutuo ſecent in vno eodem{q́ue} puncto ar
cus diurni, vel nocturni hor arum 6. vel 18. Item arcus diurni nocturniue horarũ 12. quem linea æquino-
ctialis in quolibet horologio nobis exhibet. In prioribus quatuor continentur horæ inæquales integræ cum
ſemiſſibus, & quadr antibus; in poſterioribus verò duabus integræ tantum horæ, ſed intelligendæ ſunt
etiam earum partes, quemadmodum in ſuperioribus octo tabulis horarum æqualium dictum est. Nam
quemadmodum v. g. in arcu diurno horarum 12. ſe mutuo inter ſecant hora 3. à meridie, & hora 9. in-
ęqualis diurna, ita quoque hora 3 {3/4}. a meridie, & hora inæqualis 9 {3/4}. eundem ar cum in vno eodem{q́ue}
puncto interſecabunt, at que ita de cæteris dicendum eſt.

221033
## Arcus diurnus \\ horarũ 6. in quo \\ oritur Sol hora \\ 9. poſt med. noc. \\ & hora 12. in- \\ ęquali matutina, \\ & ſingulæ ſemi- \\ horę à mer. vel \\ med. noc. reſpon \\ dent ſingulis ho \\ ris inequalibus \\ diurnis. Horę in \\ ęquales \\ diurnę. # Horę à \\ med. no \\ cte. XII # IX {1/4} # 9 {1/8} {1/2} # 9 {1/4} {3/4} # 9 {3/8} 1 # 9 {1/2} 1 {1/4} # 9 {5/8} 1 {1/2} # 9 {3/4} 1 {3/4} # 9 {7/8} II # X 2 {1/4} # 10 {1/8} 2 {1/2} # 10 {1/4} 2 {3/4} # 10 {3/8} III # 10 {1/2} 3 {1/4} # 10 {5/8} 3 {1/2} # 10 {3/4} 3 {3/4} # 10 {7/8} IIII # XI 4 {1/4} # 11 {1/8} 4 {1/2} # 11 {1/4} 4 {3/4} # 11 {3/8} V # 11 {1/2} 5 {1/4} # 11 {5/8} 5 {1/2} # 11 {3/4} 5 {3/4} # 11 {7/8} VI # 44
## Arcus nocturnus \\ horarum 18. in \\ quo Sol occidit \\ hora 3. à meri- \\ die, & hora 12. \\ inęquali veſper- \\ tina, & ſingula \\ ſpatia hor. 1 {1/2}. à \\ merid. vel med. \\ noc. rñdẽt ſingu \\ lis horis inęqua- \\ libus nocturnis.
Horę in \\ ęquales \\ noctur. # Horæ à \\ meri- \\ die.
IX # III
{1/4} # 3 {3/8}
{1/2} # 3 {3/4}
{3/4} # 4 {1/8}
1 # 4 {1/2}
1 {1/4} # 4 {7/8}
1 {1/2} # 5 {1/4}
1 {3/4} # 5 {5/8}
II # VI
2 {1/4} # 6 {3/8}
2 {1/2} # 6 {3/4}
2 {3/4} # 7 {1/8}
III # 7 {1/2}
3 {1/4} # 7 {7/8}
3 {1/2} # 8 {1/4}
3 {3/4} # 8 {5/8}
IIII # IX
4 {1/4} # 9 {3/8}
4 {1/2} # 9 {3/4}
4 {3/4} # 10 {1/8}
V # 10 {1/2}
5 {1/4} # 10 {7/8}
5 {1/2} # 11 {1/4}
5 {3/4} # 11 {5/8}
VI # XII
55
## Arcus diurnus \\ horarum 18. in \\ quo Sol oritur \\ hora 3. à med. \\ noc. & hora 12. \\ inę quali matuti- \\ na, & ſingula ſpa \\ tia hor. 1 {1/2}. à \\ merid. vel med. \\ noc. rñdẽt ſingu \\ lis horis inęqua- \\ libus diurnis.
Horę in \\ ęqual es \\ diurnę. # Horæ à \\ med. no \\ cte.
XII # III
{1/4} # 3 {3/8}
{1/2} # 3 {3/4}
{3/4} # 4 {1/8}
I # 4 {1/2}
1 {1/4} # 4 {7/8}
1 {1/2} # 5 {1/4}
1 {3/4} # 5 {5/8}
II # VI
2 {1/4} # 6 {3/8}
2 {1/2} # 6 {3/4}
2 {3/4} # 7 {1/8}
III # 7 {1/2}
3 {1/4} # 7 {7/8}
3 {1/2} # 8 {1/4}
3 {3/4} # 8 {5/8}
IIII # IX
4 {1/4} # 9 {3/8}
4 {1/2} # 9 {3/4}
4 {3/4} # 10 {1/8}
V # 10 {1/2}
5 {1/4} # 10 {7/8}
5 {1/2} # 11 {1/4}
5 {3/4} # 11 {5/8}
VI # XII
66
## Arcus nocturnus \\ horarum 6. in \\ quo Sol occidit \\ hora 9, poſt me- \\ ridiem, & hora \\ 12. inæquali ve- \\ ſpertina, & ſingu \\ læ ſemihoræ à \\ merid. vel med. \\ noc. rñdẽt ſingu \\ lis horis inęqua- \\ lib9 nocturnis.
Horę in \\ ęquales \\ noctur. # Horæ à \\ meri- \\ die.
XII # IX
{1/4} # 9 {1/8}
{1/2} # 9 {1/4}
{3/4} # 9 {3/8}
I # 9 {1/2}
1 {1/4} # 9 {5/8}
1 {1/2} # 9 {3/4}
1 {3/4} # 9 {7/8}
II # X
2 {1/4} # 10 {1/8}
2 {1/2} # 10 {1/4}
2 {3/4} # 10 {3/8}
III # 10 {1/2}
3 {1/4} # 10 {5/8}
3 {1/2} # 10 {3/4}
3 {3/4} # 10 {7/8}
IIII # XI
4 {1/4} # 11 {1/8}
4 {1/2} # 11 {1/4}
4 {3/4} # 11 {3/8}
V # 11 {1/2}
5 {1/4} # 11 {5/8}
5 {1/2} # 11 {3/4}
5 {3/4} # 11 {7/8}
VI # XII

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Scan	Original
111	91
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116	96
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Scan	Original
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