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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[180] SVPERFICIALIS.
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CAP. VI.
QVibuſdam in locis vtuntur quidam quodam inſtrumento piſtorio ad ſubigendam pa-
ſtam
, vnius tantum hominis ui adhibita, quæ quidem machina cum mihi di-
gna
contemplatione eſſe videatur, eius aliquam rationem proponere volui, pro cu-
ius
deſcriptione imaginemur planum, in quo ſedet ille, qui voluit paſtam, & in quo
ipſa
paſta eſt repoſita .T.S.D. & triangulum .T.A.S. immobile perpendiculare-
q́ue
ſuperficiei dicti plani, angulo autem .A. coniunctum lignum .A.E. vt ſemidiame
trum
mobilem, & æqualem perpendiculari ipſius trianguli,
unde .A. loco centri erit
et
.D.O. ſit ſemidiameter, qui paſtam contundit, & ab eius extremo .O. (quod .O.
quando
.D.O. orizontalis eſt, in baſi dicti trianguli reperitur) veniat lignum .O.V.
quod
cum .A.V. ſit æquale perpendiculari imaginatæ ab angulo .A. baſi .T.S. deno-
datum
tantum utvulgo dicitur ſeu flexile in .O. & in .V. vt elleuare atque; deprimere ſemidiame
trum
.D.O. poſſit, et .V.O. ſit æqualis .A.V. et .V. medium ſit inter .A. et .E. vnde .A.V.
cum
.O.V. æquales erunt .A.E. ſunt deinde duo ligna perpendicularia ab .A. ad baſim
fixa
, & immobilia inter ſe adeò diſtantia, vt inter ipſa pertranſeant .O.V. et .D.O. ſupra
& infra, ne deuiet ſemidiametrum .D.O.
In extremitate deinde ipſius .E. ſit lignum
quoddam
tenue, vt digitus polex, ad angulos rectos cum .A.E. quod ab aliquo, qui
antedictam
machinam ſtet, manibus teneatur, qui quidem homo idipſum lignum,
ideſt
ſemidiametrum .A.E. à ſuperficie trianguli dicti, ad ſe trahendo, & deinde ver
ſus
eundem triangulum impellendo, vim quandam maximam mediante ſemidia
metro
.D.O. ſuper paſtam excitat.

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