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‘formed. Having found, by computing the obferva- 
tions made on the tranfit in 1761, that, when the 
‘Abbe de la Caille’s folar tables are ufed, the epoch of 
the mean motion of Venus for 1761, as given in Dr. 
Halley’s tables, requires a corredion of q- 52^7; 
and that the place of the afcending node was, at the 
beginning of the fame year, in 7!^. 14®. 31^ 10'': 
having colleded alfo, by computing the obfervations 
of Mr. Horrox in 1639, with the afliftance of Dr. 
Halley’s tables of Venus, and the folar tables above- 
mentioned, that the motion of the planet’s mean 
longitude is 6^. 19°. 12'. 22'', and of the node 52". 
18'', in 100 Julian years : I have fuppoied the mean 
longitude of Venus, in the beginning of the year 
1769, to be 5°. 23'. 48^', and the place of the 
node to be in 2^. 14°. 33'. 21'''' — ; and have alTumed 
the reft of the planet’s elements as given in Dr. Hal- 
ley’s tables. According to thefe numbers, and the 
Abbe de la Caille’s folar tables, the ecliptic conjundion. 
w'ill happen on June 3d, 1769, at 9''. 59'. 24'' 
mean time at Greenwich, the planet’s geocentric lati- 
tude being lo'. i3''^5 N. The log. of the earth’s 
diftance from the fun =5.0065166 ; the log. of 
Venus’s diftance from the fun = 4.86 10947 ; and 
of the planet’s diftance from the earth 4.4606784; 
and the equation of the prtecefiion of the equinodial 
points = q- ij " By computing the geocentric 
longitude and latitude of the planet three hours be- 
fore and three hours after the ecliptic conjundion, I 
find the planet’s hourly motion from the fun in the 
ecliptic = 3^ 57'', 7 ; the hourly motion in the re- 
lative orbit = 4'. o" ^ 3 ; the hourly motion in lati- 
tude = o'. 35", 45 ; the angle of the planet’s path 
with 
