Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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<
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BT, ES, & </
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A D &</
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<
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CA:</
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<
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<
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<
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curſu, eſt SA. </
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&</
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<
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communes ſint axis AD, & </
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<
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ponens {_n_/_m_}; </
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<
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CA. </
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<
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_formem_ AFB continget.</
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<
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<
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<
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AD:</
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componendóque TD. </
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uiam eſt (ex hypotheſi) CA. </
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<
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nis converſionem CA. </
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CD. </
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<
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quòd BT _paraboliformem_ AFB tangit.</
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deſignabitur hinc _paraboliformis_; </
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get. </
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ponens. </
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<
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multiplicando) _mt_ - _ms_ = 2 _tn_ - _sn_; </
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<
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2 _nt_ = _ms_ - _ns_. </
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<
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_m_ - _n. </
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te Propoſitum.</
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<
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AFB extra _circulum_ AEB tota cadet.</
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<
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<
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circulum ad E, paraboliformem in F; </
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ES _circulum_, & </
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