Apian, Petrus, Instrvmentvm Sinvvm, sev primi mobilis

Table of contents

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[11.] REGVLA PRIMA.
[12.] REGVLA SECVNDA.
[13.] TALIS AD VSVM QVADRANS ADORNARI debet quantuſcun ſit.
[14.] PRONVNCIATVM II.
[15.] PRONVNCIATVM III. Latitudinem Lunæ ab eclyptica per ſinus colligere.
[16.] PRONVNCIATVM IIII.
[17.] PRONVNCIATVM V.
[18.] PRONVNCIATVM VI.
[19.] PRONVNCIATVM VII.
[20.] PRONVNCIATVM VIII.
[21.] PRONVNCIATVM IX.
[22.] PRONVNCIATVM X.
[23.] PRONVNCIATVM XI.
[24.] PRONVNCIATVM XII.
[25.] PRONVNCIATVM XIII.
[26.] PRONVNCIATVM XIIII.
[27.] PRONVNCIATVM XV.
[28.] PRONVNCIATVM XVI.
[29.] PRONVNCIATVM XVII.
[30.] PRONVNCIATVM XVIII.
[31.] PRONVNCIATVM XIX.
[32.] PRONVNCIATVM XX.
[33.] PRONVNCIATVM XXI.
[34.] PRONVNCIATVM XXII.
[35.] PRONVNCIATVM XXIII.
[36.] PRONVNCIATVM XXIIII.
[37.] PRONVNCIATVM XXV.
[38.] PRONVNCIATVM XXVI.
[39.] PRONVNCIATVM XXVII.
[40.] PRONVNCIATVM XXVIII.
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16GENVINVS VSVS meros in linea AB dele, quia amplius nulli erũt uſui. Totidem etiã puncta eſſe debebũt
ſinus recti, ea ſic inuenies.
Propone tibi tabulã hic ſequentẽ, quæ in prima linea continet
100.
uerſus unũquod repoliti ſunt gradus aliq̊t cũ minutis, id aũt quid ſit, hoc modo in
telliges.
Quod ſi centeſimã partẽ cupis in ſemicirculũ A F C conſignare, filũ colloca ſu-
per 0.
grad. 22. minut. iuxta literã B, & ubicũ filum attinget ſemicirculũ A F C, ibi pri
mam partem ex centum repone.
Rurſus ſi duo uis imponere in ſinu recto, filum age po-
5[Figure 5] nito ſuper 1.
gra. 9. mi. illud ubi tanget ſemicirculũ A F C, ibi conſigna
2000.
Etin hũc modum operaretam diu, donec ſemicirculũ iſtum di-
uiſeris in centum partes, numeros quo adſcribe ab Auerſus C.
Et ſic
totidem habebis pũcta ſinus recti quotuerſi ſeu perfecti.
Hinc ſi adhuc
puncta ſinus uerſi in aliquot partes cupis ſubdiuidere, puto in 10.
uel
100.
ut hic, operæprecium fuerit te etiam puncta ſinus recti in tot par-
tes diſſecare.
ne magnopere refert, ſi ea diuidas in tot partes æquales,
quamuis in ſe ſint inæquales.
Quomodo autem in quibuſdã locis quan
dam diminutionem partium iſtarum facere debeas, ex ipſo aſpectu tu-
opte marte facile conijcies.
Faciem ita huius iam præparati inſtrumenti hic tibi propoſitã rectius intuere.
6[Figure 6]

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