Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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1totum hoc ſpa­
13[Figure 13]
tium illud eſt,
cui Sol ad per­
pendiculum im­
minet.
XVII
Terræ ma­
gnitudinem
eiuſque ad
Solem pro­
portionem̨
inueſtigare
ex ſpatio,
quod umbris
caret.
Sed quærendum
ſupererat, quo­
ta totius circuli
maximi pars eſ­
ſent ſtadia 300.
Conſtituto ita­
que terræ centro
in C, & oculo
obſeruatoris iņ
O, ductum in­
telligebam ex cen­
tro S radium S
OC, qui cum̨
radio OT Solem
contingente da­
bat angulum S
OT ſemidiametrum apparentem Solis Apo­
gæi gr.o.m.15., vt placet Tychoni, Longo­
montano, Magino, Keplero. Item ex C du­
ctus intelligatur radius Solem tangens, qui
terræ circulum maximum ſecat in K; & eſt
OK ſemiſsis ſpatij, quod caret vmbris meri­
dianis die ſolſtitij æſtiui; continet autem ſta­

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