Ptolemy's Tetrabiblos : $b or Quadripartite, being four books of the influence of the stars ... with a preface, explanatory notes, and an appendix containing extracts from the Almagest of Ptolemy and the whole of his Centiloquy, together with a short notice of Mr. Ranger's zodiacal planisphere and an explanatory platePtolemy
Religion
Ptolemy's Tetrabiblos : $b or Quadripartite, being four books of the influence of the stars ... with a preface, explanatory notes, and an appendix containing extracts from the Almagest of Ptolemy and the whole of his Centiloquy, together with a short notice of Mr. Ranger's zodiacal planisphere and an explanatory plate
Ptolemy
Astrology -- Early works to 1800
[169] That is to say, of the oblique ascension, which is here required
to be reckoned; because the prorogatory and preceding place is in the
ascendant. _Vide_ p. 95, and Note ² in p. 94. And the first point
of Gemini, on arriving at the ascendant, will be distant from the
mid-heaven 102° 39′ by right ascension; the 13th degree of Aquarius
being then in culmination in the prescribed latitude. The oblique
ascensions in the latitude 30° 22′ N. are also shown in the extract
referred to in the preceding note: and it thereby appears, that Aries
and Taurus ascend in 45° 5′, instead of 46°.
[170] Or, rather, 57° 44′—by right ascension.—_Vide_ extract above
referred to.
[171] _Vide_ p. 95.
[172] Or on the cusp of the 7th House.
[173] Or, rather, 32° 16′—by right ascension again.—_Vide_ extract as
before.
[174] By right ascension. The amount according to the Table is,
however, 102° 39′, as before stated.
[175] On which the 10th degree of Virgo will then be posited.
[176] By oblique descension and ascension: _Vide_ p. 95.—The Table
shows the amount to be 70° 23′.
Again, let the first point of Aries have another position, not in
any angle,[177] but, for instance, at the distance of three temporal
hours past the meridian; so that the 18th degree of Taurus may be
on the mid-heaven, and the first point of Gemini be approaching the
mid-heaven, at the distance of thirteen equatorial times. The seventeen
times must, therefore, be again multiplied by the three hours, and the
first point of Gemini, at its second position, will be found to be
past the meridian, at the distance of 51 times.[178] The distance of
13 times of the first position and 51 times of the second position are
then both to be taken; and they will produce 64 times. In the former
instances the prorogatory place performed in the same succession; viz.
occupying 46 times in coming to the ascendant, 58 in coming to the
mid-heaven, and 70 in coming to the west; so that the present number of
times, depending on the intermediate position between the mid-heaven
and the west, and being 64, also differs from each of the other
numbers, in proportion to the three hours’ difference of position. For,
in the other cases which proceeded by quadrants,[179] according to the
angles, the times progressively differed by twelve, but, in the present
case of a minor distance of three hours, they differ by six.[180]
[177] In reference to p. 95, and Note ¹ in the same page.
[178] The 18th degree of Cancer being then in culmination.
[179] Or semi-diurnal arcs, each equal to six temporal hours.
[180] The amount of the progressive difference of the times of
prorogation, as here mentioned, is of course only applicable to the
parallel of declination of the first point of Gemini, in the latitude
before quoted. It must necessarily vary in all other parallels of
declination, and also in all other latitudes.
Public-domain text, read in full here on John Shaqi.
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