JMifceUanea Citriofa. 277 



mean its Horizontal Diameter, or that paral- 

 lel to the Horizon ; for the ere& Diameter, in 

 a Circle Perpendicular to the Horizon, may by 

 the Refra&ion be varied, and thereby made, 

 not greater, but lefs than when higher; as 

 hath been noted in the Name of Sol Ellipicm 

 at the Horizon?) Suppoiing , I fay, that 

 the Sun's apparent Diameter Horizontal, ta- 

 ken by Inftrument, is the fame near the Ho- 

 rizon, as in a higher Poiition, I take its Ima- 

 ginary greatnefs which is fanfied near Horizon, 

 to be only a deception of the Eye j or rather 

 the Imagination from the Eye. 



For fure it is, that the Imagination doth 

 not eftimate the greatnefs of the Objed feen, 

 only by the Angle which it makes at the Eye ; 

 but, by this compared with the fuppofed di- 

 ftance. 



True it is that, Ceteris paribus, we judge 

 that to be the greater Objed, which makes 

 at the Eye the greater Angle: But not fo if 

 apprehended at different Diftances. 



For if through a Cafement (or leffer aper- 

 ture) we fee a Houfe at iog Yards diftance \ 

 this Houfe (though feen under a lefs Angel) 

 doth not to us feem lefs than the Cafement 

 through which we fee it, (or this greater than 

 that, becaufe it makes at the Eye the greater 

 Angle :) But the Imagination makes a com- 

 parative Eftimate from the Angle and Di- 

 ftance jointly coniidered. 



So that, if two things feen under the fame 

 or equal Angles, if to one of them there be 

 ought which gives the apprehenfion of a 

 greater Diftance, that to the Imagination will 

 appear greater. 



T 3 Now 



