The grammar of astrology : containing all things necessary for calculating a nativity by common arithmetic / by Zadkiel the seer.

  • Zadkiel, 1795-1874.
Date:
1833
Catalogue details

Licence: Public Domain Mark

Credit: The grammar of astrology : containing all things necessary for calculating a nativity by common arithmetic / by Zadkiel the seer. Source: Wellcome Collection.

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    Rules to Calculate the Longitude of the Cusps of the Houses, for persons not possessing a Table of Housesor; if the birth be far distant in latitude from the place for which the Table of Houses is calculated. Rule. 1.—The oblique ascension of the house is found by adding 30° to the A. R. of the M. C. for each house distant; thus,, 30° for the 11th, 60° for the 12th, 90° for the ascendant, 120° for the 2d, and 150° for the 3d. Rule 2.—Find the distance of the cusp of the house from T* or ; the former by taking its oblique ascension from 360 if above 270°, or the latter by taking it from 180° if above 90°. Rule 3.—Add the log. cosine of the oblique ascen- sion of the cusp of the house (reduced as by Rule 2) to the log. co-tangent of the pole of the house: the sum is the log. cotangent of angle A. Rule 4.—If the oblique ascension be less than 90° from Aries, add 23° 28' to angle A ; if it be less than 90° from Libra, take the difference between 23° 28' and angle A: the result call angle B. Rule 5.—xAdd together the arithmetical complement of the log. cosine of B, the log. cosine of A, and the _ log. tangent of the oblique ascension of the cusp of the house : the sum will be the log. tangent of its