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

Table of contents

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[81. Not.]
[82. Not.]
[83. Series quarta.]
[84. Not.]
[85. Series quinta.]
[86. Series ſexta.]
[87. Not.]
[88. Series ſeptima.]
[89. Not.]
[90. Series octava.]
[91. Series nona.]
[92. Not.]
[93. Series decima.]
[94. Series undecima.]
[95. Not.]
[96. Series duodecima]
[97. Series decima tertia]
[98. Not.]
[99. Laus DEOO ptimo Maximo. FINIS.]
[100. ERRATA]
[101. Addenda Lectionibus Geometricis.]
[102. _Probl_. I.]
[103. _Probl_. II.]
[104. _Probl_. III.]
[105. Addenda Lectionibus Geometricis.]
[106. _Theor_. I.]
[107. _Theor_. II.]
[108. _Theor_. III.]
[109. _Theor_. IV.]
[110. _Theor_. V.]
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page |< < (63) of 393 > >|

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,
Fig. 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.
I. Fiat CK. AC: : CB. T. ac inter CB, & T ſit proportione
Fig. 8@.media V (unde CBq.
Vq: : CB. T: : CK. AC). tum centro A,
intervallo √:
: ACq - Vq. deſcribatur circulus reflectentem

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