149 ASTRONOMICAL AnD 
'g’s true mot.ono's difcin 1" 10°38” reduc.totheecli. 6'56", 171 
Difference of parallaxes in longitude, -- o, 803 
-— the vif. tranfit-line reduced totheecliptic, 6 56, 974 
= 416, 974. 
SO Eum in a daiónde i in de 881^ 1 747-168 
Difference of parallaxes in latitude, | — 308 
Vifible motion in latitude, | BY 
n pea == 60, 86 
$ Xv 
. .Hence, 
M3U, the angle of Mercury's vifible way 8° 18' 15" ; — 
2 M, the vifible tranfit-line, 421'', 592 ;—angle $6N 12? 35” 
1^, confequently, yoD = $oF = osC 20° 55' 167, and 
angle $0C 69° 6’ 44" ,—fide Cx, Mercury's vifible latitude 
from the fun, at the time of the firft internal contatt, 903'*, 
$43 = 15' 3’, £435 which, added to tbe parallax in latitude 
from the fun, 2", 837, gives 15’ 6", 38, for Mercury's true 
latitude by obfervation, at the time of the firft internal conta& ; 
—the fide Co, the vifible difference of longitude of the cen- 
ters of the fun and Mercury, 344", 809 ; which, MER by the 
parallax in longitude from the fun, 2", 158 gives 342", 651 for 
the true difference of longitude; which, converted vum time, 
gives 58' 92". This added to ro™ 12/41", A. M, gives 11* 
Io' 50%", for the apparent time of the true ecliptic conjunc- 
-In 58° 92", Mercury's gusce latitude was increafed so! 
365 ; which, added to 15° 6", 38, his latitude at the firft in- 
ternal contact, gives 15' 56", 745, for Mercury's true latitude 
by obfervation, at the time of the true ecliptic | conjundaee 
by the internal contacts. 
The 
