200 DE MORGAN'S ACCOUNT OF WRIGHT'S SPECULATIONS 



the primary, secondary, and tertiary constituent Orbits, &c. 

 framing the Hypotheses, are represented in Plate XXI I., 

 and the Consequence of such a Theory arising from such 

 a universal Law of Motion in Plate XXIII. where B, D 

 denotes the local Motion of the Sun in the true Orbis 

 Magnus^ and E, C that of the Earth in her proper secondary 

 Orbit, which of course is supposed, as is shown in the 

 Figure to change its sidereal Positions, in the same Manner 

 as the Moon does round the Earth, and consequently will 

 occasion a kind of Procession, or annual Variation in the 

 Place of the Sun, not unlike that of the Equinoxes, or 

 Motion of all the Stars together, from West to East round 

 the Ecliptic Poles, and probably may in some Degree be 

 the Occasion of it. This Angle is represented, but much 

 magnified, by the lines F, C, G, and the Unnaturalness, 

 or Absurdity of a right Line Motion of the Sun by the 

 Line I, H. 



" The second Method of solving this Phenomena, is by a 

 spherical Order of the Stars, all moving with different 

 Direction round one common Center, as the Planets and 

 Comets together do round the Sun, but in a kind of Shell, 

 or concave Orb. The former is easily conceived, from 

 what has been already said, and the latter is as easy to be 

 understood, if you have any Idea of the Segment of a 

 Globe, which the adjacent Figures, will, I hope, assist you 

 to. The Doctrine of these Motions will perhaps be made 

 very obvious to you, by inspecting the following Plates. 

 Plate XXIV. Is a Representation of the Convexity, if I may 

 call it so, of the intire Creation, as a universal Coalition of 

 all the Stars consphered round one general Center, and as 

 all governed by one and the same Law. Plate XXV. Is 

 a centeral Section of the same, with the Eye of Providence 

 seated in the Center, as in the virtual Agent of Creation. 

 Plate XXVI. Represents a Creation of a double Construc- 

 tion, where a superior Order of Bodies C, may be imagined 

 to be circumscribed by the former one A, as possessing a 

 more eminent Seat, and nearer the supream Presence, and 

 consequently of a more perfect Nature. Lastly, Plate 

 XXVII. Represents such a Section, and Segments of the 

 same, as I hope will give you a perfect Idea of what I 

 mean by such a Theory. Fig. i. is a corresponding Section 

 of the Part at A, in Fig. 2. whose versed Sine is equal to 



