( 2}7 ) 
deed April 23 0 1661, but fo imperfe&ly, that neither 
Ingrefs nor Egrefs was any where obferv’d ; and, 
though it be certain, that he traverfed the Sun on A - 
/77/26 0 , 1674; and again April 14, 1707, yet we 
were fo unfortunate, that the Conjun&ion in both hap- 
pened fo near Midnight, that he efcaped unfeen by all 
the Aftronomers of Europe , excepting fingly Mr. Roe - 
mer at Copenhagen , whole Obfervation I have lately 
received by the Favour of Mr. *De /’ IJle the Aftro- 
nomer, communicated in the Words of the Manufcript 
Journal of Obfervations of the- faid Mr .Roemer, 
“ Hodie fexto Mali ( Anno 1707) hora matutina 
“ 4 h \<jjpettabatur Mercurius in extremo margine 
“ Solis jamj am exiturus j a It us fupra imum folis 
« marginem 4 diametri filar is , & ad finiftram m 
*'■ Tubo (fc. invert ente ) Accuratius hac determi - 
tC nare non licuit ob moram nimis brevemd It was 
great Pity, that he did not, at lead:, eftimate, how ma- 
ny Diameters of his Body he wasdiftant from the Limb 
of the Sun , or what Part of a Diameter, if fo near : 
But having examined this Obfervation, I find that the 
Sun , at that Time, was but juft rifien, or rather riling, 
and foon after entered into a Cloud, fo that the Limb 
of the Sun could not be diftin&ly feen, it always un- 
dulating and fparkling much, when fo near the Hori- 
zon ; in which Circumftance, a juft Obfervation could 
hardly be made. 
Let us now fee how our Numbers, correfted as above, 
will reprefent this Obfervation. Anno 1707, April 
24° i6 h 19' at Copenhagen is 15^18' at Greenwich , 
, but iy h 24 zd'T.<eq* To this Time,. I find the Sun'i 
true Place ^ 14 0 70' F', and his Diftance from the 
Earth 10 1007. The correft Epoch a of Mercury^* 
mean Motion, for the Year 1707, is 3 s 13 0 1 8' 45 ". 
to which adding, for the reft of the rime, 3 s 19° 18", 
we 
