1 predicted by Thales. 229 
alluded to, are sent with this paper for the inspection of the 
Members of the Royal Society, should they be desirous of 
entering more fully into the detail. The substance of those 
inquiries I shall now proceed to lay before them. 
The eclipse, which is supposed to have been that alluded to 
by Pliny, happened May 28th, 585 B. C. : and the time of 
the ecliptic conjunction was at 2 h 38' 22" in the afternoon, mean 
time at Greenwich, or 2 h 46' 24" apparent time. The elements 
were as follow : 
True longitude of the luminaries i s 29 0 41' 4" 
Sun’s declination, north - 20 23 17 
■ — — semi-diameter - - 15 45 
Moon’s semi-diameter - - 16 43 
= — — — equatorial parallax - 61 13 
■ horary motion from the sun 35 29 
— ; — — true latitude - - 12 39 
horary motion in latitude - 3 30 
By a projection of this eclipse, I find that the sun was cen- 
trally eclipsed on the meridian, about the middle of the Atlantic 
ocean, in N. lat. 33^° and W. long. 43 0 . The centre of the 
moon’s shadow then proceeded to the parallel of N. lat. 40°, 
in W. long. 13 0 ; where, turning to the southward, it crossed 
Spain, and traversed the course of the Mediterranean. By a 
trigonometrical calculation I have ascertained that the sun set 
centrally eclipsed on the borders of the Red Sea in N. lat. 
28° 1', and E. long. 35 0 2'. So that at no time was this eclipse 
central in or near any part of Asia Minor. It happened like® 
wise ten years after the death of Cyaxares, according to the 
received chronology. 
