Barrow, Isaac, Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur

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[Item 1.]
[2.] Imprimatur,
[3.] LECTIONES _OPTICÆ & GEOMETRICÆ:_ In quibus PHÆNOMENωN OPTICORUM Genuinæ _Rationes_ inveſtigantur, ac exponuntur: ET _Generalia_ Curvarum Linearum _Symptomata declarantur_. Auctore Isaaco Barrow, Collegii _S S. Trinitatis_ in Academia _Cantab._ Præfecto, Et _SOCIETATIS REGIÆ_ Sodale.
[4.] LONDINI, Typis _Guilielmi Godbid_, & proſtant venales apud _Robertum Scott_, in vico Little-Britain. 1674.
[5.] SPECTATISSIMIS VIRIS Roberto Raworth & Thomæ Buck ARMIGERIS;
[6.] Iſaac Barrow
[7.] Epistola ad LECTOREM.
[8.] Epiſtola; in qua Operis hujus Argumen-tum, & ſcopus brevitèr exponuntur.
[9.] Lect. I.
[10.] Lect. II.
[11.] Lect. III.
[12.] _Corol_. 1. Ang. _a_ BG. ang. _a_ BP > ang. δ BH. ang. δ BP. 2. Ang. _a_ BG. ang. PBG > ang. δ BH. PBH.
[13.] Lect. IV.
[14.] Lect.V.
[15.] Lect. VI.
[16.] Lect. VI I.
[17.] Lect. VIII.
[18.] Lect. IX.
[19.] Lect. X.
[20.] Lect. XIV.
[21.] Lect. XV.
[22.] APPENDICVLA.
[23.] Lect. XVI.
[24.] Lect. XVII.
[25.] Lect. XVIII.
[26.] ERRATA.
[27.] Benevolo Lectori.
[28.] Lectio I.
[29.] Lect. II.
[30.] Lect. III.
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8163
Lect. IX.
II. _Dato circulo reflectente_ (cujus centrum C) _datiſque binis pun-_
_ctis
;
ab horum uno recta ducatur, cujus rtflexus per alterum tran-_
_ſeat
._
1. Si data puncta (puta A, X) ſint ambo in circuli peripheria,
11Fig. 86. manifeſtum eſt biſecto arcu AX in N, connexiſque ſubtenſis NA,
N
X, rectas NA, NX ſibi mutuò reflexas fore;
ſeu, junctâ CN,
angulum
CNXangulo CNA æquari.
2. Etiam ſi datorum unum (X) in circumferentia ponatur; liquet,
22Fig. 87. connexis AX, CX, factóque angulo CXH = CXA, ſore XA,
XH
alterum alterius reflexum.
I. Fiat CK. AC: : CB. T. ac inter CB, & T ſit proportione
44Fig. 8@. media V (unde CBq.
Vq: : CB. T: : CK. AC). tum centro A,
intervallo
:
: ACq - Vq. deſcribatur circulus

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