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

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[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.
[31.] Lect. IV.
[32.] Lect. VII.
[33.] Lect. VIII.
[34.] Lect. IX.
[35.] Lect. X.
[36.] Exemp. I.
[37.] _Exemp_. II.
[38.] _Exemp_. III
[39.] Exemp. IV.
[40.] Eæemp. V.
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page |< < (137) of 393 > >|
330137 in quarto _a_ + {_cc_/4_a_}& gt;_ n_; quæ tamen inæqualitas eo minor eſt, quò
AE (vel _n_) major exiſtit.
_a_ + {_cc_/_a_} = _n_.
_a_ + {_cc_/_a_} = {_nn_/_a_}.
_a_ + {_cc_/_a_} = {_n_3/_aa_}.
_a_ + {_cc_/_a_} = {_n_4/_a_3}.
Poſſit hæc ſeries explicari juxta præcedentium modum ſecundum,
11Fig. 212.&
eaſdem adhibendo curvas LXL, MXM, NXN; quarum nimi-
rum proprietas eſt, ut rectâ GK ductâ ad AH utcunque perpendicu-
lari, ſit GL = {_nn_/AG};
& GM = {_n_3/AGq}; & GN = {_n_4/AGcub}.
Nam ſi fiat angulus HAR ſemirectus, & utcunque ducatur GEO
ad AH perpendicularis;
& ſit GE. _c_: :_c_. EO; & per O intra a-
ſymptotos AD, AR deſcribatur _hyperbola_ OO;
hujuſce cum expo-
ſitis lineis LXL, MXM, NXN interſectiones, radices _a_ reſpectivas
determinabunt;
ductis utique LG, MG, NG ad AH perpendicu-
laribus;
erunt interceptæ AG ipſis _a_ æquales reſpectivè.
Poſſint conſimili modo ſubſequentes omnes æquationes explicari;
ſed eas modo duntaxat priore dabimus expoſitas.
Series quinta.
22Fig. 213.
{_cc_/_a_} - _a_ = _n_.
_cc_ - _aa_ = _nn_.
_cca_ - _a_3 = _n_3.
_ccaa_ - _a_4 = _n_4.

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