Full text: Barrow, Isaac: Lectiones Opticæ & Geometricæ

0018-01

Brevitatis gratiâ notæ quædam adhibentur, quarum hîc
ſubjungitur interpretatio.

A + B. _hoc eſt_ A & B _ſimul acceptæ_.

A - B. A, _demptâ_ B.

A - : B. _differentia ipſarun@_ A, & B.

A x B. A _multiplicata, vel ducta in_ B.

{A/B} - A _diviſa per_ B, _vel applicata ad_ B.

A = B. A _æquatur ipſi_ B.

A & gt; B. A _major eſt quàm_ B.

A & lt; B A _minor eſt quàm_ B.

A. B: : C. D A _ad_ B _eandem rationem habet, quam_ C _ad_ D.

A, B, C, D {. ./. .}. A, B, C, D _ſunt continuè proportionales_.

A. B & gt; C. D. A _ad_ B _majorem rationem habet, quàm_ C _ad_ D.

A. B & lt; C. D. A _ad_ B _minorcm rationem habet, quàm_ C _ad_ D.

A. B + C. D = \\ & gt; \\ & lt; } M. N. _Rationes_ A ad B, \\ & C ad D _compoſitæ_ {_adæquant_ \\ _excedunt_ \\ _deficiunt à_} _ratione_ M \ȧd N.

Aq. _Quadratum ex_ A.

√ A. _Latus, vel radix quadrata ipſius_ A.

A c. _Cubus e x _ A.

√ Aq + Bq. _Latus compoſiti ex_ Aq & Bq.

Reliquas, ſi quæ occurrunt, abbreviaturas Lector facili conjectur & [?]
capiet, præſerti@ in analyſi tantillùm verſatus.

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