378 Dr. Herschel’s Account of the Changes 
must have carried the large star, by this time, nearly upon the 
small one. 
h Draconis. I, 7. 
The position, Oct. 10, 1780, was 77 0 19' north-following; 
and, Oct. 30, 1802, it was 83° 41'. The change is 6° 22', in 22 
years and 20 days. The effect of a parallactic motion of the 
largest star, would have shown itself in a direction contrary to 
the observed one ; a proper motion of one of the stars, at least, 
must be admitted. 
South-preceding FI. 30 Orionis. I, 75. 
The position, Jan. 9, 1783, was 89° 36' north-preceding; 
and, Jan. 22, 1802, it was 7 9 0 12'’ north-following; which gives 
a change of 11 0 12', in 19 years and 13 days. A parallactic 
motion of either of the stars, for they are nearly equal, would 
chiefly affect their distance ; besides, the stars are so numerous 
in this part of the heavens, that we can only look upon this as 
a casual double star; a proper motion therefore must be re- 
curred to. 
71 Cassiopece. Ill, 3. 
The situation of the two stars of this beautiful double star, 
June 14, 1782, was 27 0 . ,5 6' north-following; and, Feb. 11, 
1803, it was 19° 14' ; which gives a change of 8° 42', in 20 years 
and 242 days. This arises probably from a real motion of 7] in 
space ; for parallax would have had a contrary effect. 
d Serpentis. I, 12. 
This star has not altered its angle of position sufficiently to 
be certain of the change, which only amounts to 2? 8'; this 
