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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xml:space
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</
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<
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<
s
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<
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<
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<
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<
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+ _cca_ = _n_
<
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>
.</
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<
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<
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<
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xml:space
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<
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+ _ccaa_ = _n_
<
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.</
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<
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<
s
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xml:space
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">Sit recta indefinitè protenſa AH, & </
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<
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<
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</
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<
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">fiat autem angulus RAH ſemirectus; </
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<
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<
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<
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ad AD parallela; </
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<
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<
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xml:space
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angulum DAR deſcribatur _hyperbola_ KXK; </
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xml:space
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">ſint denuò curvæ CLL,
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AMM, ANN tales, ut inter GZ, GK ſint _media_ GL, _bimedia_
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GM, _trimedia_ GN; </
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<
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<
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xml:space
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GZ) dicatur _a_, erit GK = _a_ + {_cc_/_a_}; </
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xml:space
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">GLq = _aa_ + _cc_; </
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GMcub = _a_
<
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+ _cca_; </
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<
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+ _ccaa_.</
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<
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EF ad AH parallelâ.</
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<
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_nima_; </
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gradu.</
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<
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_axis_ AC; </
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per una vera radix habetur, & </
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<
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excurrentes; </
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<
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puncta α, β γ, traductæ concipiantur _hpperbola
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_ (habentes & </
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_ſymptotos_ DA, AR) α λ, β μ, γ ν; </
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<
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CLL, AMM, ANN _aſymptoti_. </
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<
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veniunt lineis poſthac deſcribendis, quanquam de illis conticeamus.)</
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<
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