in the relative Situation of double Stars . 
s«3 
Preceding r Orionis. I, 54. 
The position, January 22, 1783, was 35 0 42' north-preceding; 
and, Jan. 25, 1802, it was 41 0 27'. The change is f 45',' in 19 
years and 3 days ; and may be owing to the effect of parallax. 
f Urste majoris. Ill, 2. 
The position, Nov, 18, 1781, was 56° 4 6 ' south- following; 
and, Oct. 3, 1802, it was 51 0 14'. The change is 5 0 32', in 20 
years and 319 days; but this cannot be accounted for by a 
parallactic motion of f, which would have occasioned a contrary 
change of the angle. 
North-following <p Herculis. I, 37. 
The position, Oct. 6, 1782, was 59 0 48' south-following; 
and, Sept. 20, 1802, it was 65° o'; which gives a change of 
5 0 12', in 19 years and 349 days. It cannot be ascribed to a 
parallactic motion of the largest star. 
North-following v Aquarii. I, 4 6. 
The position, July 31, 1783, was 62° 27' north-preceding; 
and, August 29, 1802, it was 6y° 27'. The change is 5 0 o', in 
19 years and 29 days. The distance of these stars is now greater 
than it was formerly July 31, 1783, with 460, they were rather 
more than 1 diameter asunder. August 29, 1802 , 1 found them 
too far distant to be put into the first class. If any effect of 
parallax can reach such small stars, it is so far in favour, that it 
will account for an increase of the distance, but not for the 
change of the angle of position. 
3D 
MDCCCIV. 
