Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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biſecat angulum ANK; </
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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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">&</
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<
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<
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</
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<
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<
s
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<
s
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<
s
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s
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<
s
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<
s
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<
s
xml:id
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<
s
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<
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(communem adſciſcendo rationem BZ ad AB). </
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<
s
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<
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<
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AB + AN. </
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<
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xml:id
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xml:space
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<
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<
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<
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<
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BZ. </
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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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<
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<
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permutandóque CZ. </
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<
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<
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<
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<
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<
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<
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<
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BZ &</
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<
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xml:space
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<
s
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<
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<
s
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<
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<
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<
s
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xml:space
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propinquius eſt, quàm ipſum K: </
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<
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A, _a_ (quorum A fit à fpeculo remotiùs, quàm _a_) erit CZ &</
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<
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</
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<
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<
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<
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<
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<
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<
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<
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<
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_a_ C. </
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<
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<
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<
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<
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<
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<
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<
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BC. </
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<
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<
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<
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<
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<
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<
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<
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<
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</
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<
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<
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<
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incidentium AN, AR reflexi GN, HR axem interſecent punctis
<
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K, L; </
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<
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<
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<
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<
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<
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quoniam eſt AC. </
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<
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<
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xml:id
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xml:space
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<
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xml:space
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">CBq. </
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<
s
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">itémque CL.
<
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</
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<
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">AC :</
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<
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">: CBq. </
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<
s
xml:id
="
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xml:space
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">ACq - ARq. </
s
>
<
s
xml:id
="
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xml:space
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">erit ex æquo perturbatè CL. </
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<
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CK :</
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<
s
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xml:space
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">: ACq - ANq. </
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<
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xml:space
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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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<
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xml:space
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<
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xml:space
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<
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xml:space
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">: CZ. </
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<
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="
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xml:space
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">ZB.
<
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</
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<
s
xml:id
="
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xml:space
="
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">erit CZ. </
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>
<
s
xml:id
="
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xml:space
="
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">CK :</
s
>
<
s
xml:id
="
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xml:space
="
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">: ACq - ANq. </
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>
<
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xml:id
="
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xml:space
="
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">ACq - ABq. </
s
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<
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="
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xml:space
="
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">& </
s
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<
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xml:id
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xml:space
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">CL. </
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<
s
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">CZ :</
s
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<
s
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="
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xml:space
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<
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ACq - ARq. </
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<
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="
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xml:space
="
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">ACq - ABq.</
s
>
<
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="
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</
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<
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<
s
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">XI. </
s
>
<
s
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xml:space
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">Hinc perſpicuum eſt obliquioris reflexi concurſum à centro
<
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magìs elongari quam rectioris; </
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<
s
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xml:space
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>
<
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xml:space
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>
<
s
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="
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xml:space
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">CK. </
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>
<
s
xml:id
="
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xml:space
="
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">Cùm
<
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enim ſit ACq - ANq &</
s
>
<
s
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xml:space
="
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">gt; </
s
>
<
s
xml:id
="
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xml:space
="
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">ACq - ARq; </
s
>
<
s
xml:id
="
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xml:space
="
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">erit CL &</
s
>
<
s
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="
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"
xml:space
="
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">gt; </
s
>
<
s
xml:id
="
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"
xml:space
="
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">CK.</
s
>
<
s
xml:id
="
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xml:space
="
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"/>
</
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<
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>
<
s
xml:id
="
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xml:space
="
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">XII. </
s
>
<
s
xml:id
="
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xml:space
="
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">Hinc neceſſariò duo quilibet ad eaſdem axis partes incidentium
<
lb
/>
reflexi (quales NK, RL) ſeſe priùs quàm axem interſecabunt, puta
<
lb
/>
ad X. </
s
>
<
s
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="
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xml:space
="
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">quo poſito.</
s
>
<
s
xml:id
="
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="
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"/>
</
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<
p
>
<
s
xml:id
="
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xml:space
="
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">XIII. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">Adnotari poteſt angulum GXH vel KXL (à reflexis oc-
<
lb
/>
currentibus incluſum) æquari angulo NCR unà cum differentia angu-
<
lb
/>
lorum incidentiæ; </
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">vel, duplo angulo NCR unà cum ang. </
s
>
<
s
xml:id
="
echoid-s3601
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xml:space
="
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">NAR. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">‖ Etenim
<
lb
/>
ang. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">KXL = ang. </
s
>
<
s
xml:id
="
echoid-s3604
"
xml:space
="
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">ALR - AKN = ang. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ACR + CRL -: </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ang.
<
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/>
</
s
>
<
s
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="
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">
<
note
position
="
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"
xlink:label
="
note-0078-01
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xlink:href
="
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xml:space
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">Fig. 83.</
note
>
ACN + CNK = ang. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ACR - ACN + : </
s
>
<
s
xml:id
="
echoid-s3609
"
xml:space
="
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">ang. </
s
>
<
s
xml:id
="
echoid-s3610
"
xml:space
="
preserve
">CRL -
<
lb
/>
CNK = ang NCR +: </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ang CRS - CNP. </
s
>
<
s
xml:id
="
echoid-s3612
"
xml:space
="
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">‖ Quinetiam ang.
<
lb
/>
</
s
>
<
s
xml:id
="
echoid-s3613
"
xml:space
="
preserve
">CRS - CNP = ang. </
s
>
<
s
xml:id
="
echoid-s3614
"
xml:space
="
preserve
">RCA + CAR -: </
s
>
<
s
xml:id
="
echoid-s3615
"
xml:space
="
preserve
">ang. </
s
>
<
s
xml:id
="
echoid-s3616
"
xml:space
="
preserve
">NCA </
s
>
</
p
>
</
div
>
</
text
>
</
echo
>
