of Double Shirs, i i 5 
occafionally fifed other abbreviations that will be eafily under- 
flood. 
It may be feen, that this catalogue is yet in a very imper- 
fe£t Rate, many of the ftars not having even the principal 
elements of diftance and pofition determined with any degree 
of accuracy ; but having already mentioned the reafon why I 
give it imperfect as it is, I can only add that my endeavours 
will not be wanting foon to remove thofe defects. However, 
fince this can only be a work of fome time, we may hope, in 
the mean while, that many lovers of the fcience will turn 
their thoughts upon the fame fubjedl. 
CATALOGUE OF DOUBLE STARS. 
FIRST CLASS. 
1. £ Bootis. flamst. 36. Ad dextrum femur in perizomate. 
Sept. 9. Double. Very unequal. L. reddifh ; S. blue, or 
1779- rather a faint lilac. A very beautiful objedl. The 
vacancy, or black divifion between them, with 227 
is i diameter of S. ; with 460, 1 1 diameter of L. ; 
with 932, near 2 diameters of L. ; with 1159? ^iH 
farther ; with 2010 (extremely diftinft) 24 diameters 
of L. Thefe quantities are a mean ol two years ob- 
fervation. Pofition 31 0 34' n. preceding. 
2. I Urfce majoris. fl. 53. In dextro pofteriore pede. 
May 2, Double. A little unequal. Both w. and very 
1780. bright. The interval with 222 is 4 diameter of L. ; 
with 227, 1 diameter of L. ; with 278, near 1 \ dia- 
meter of I/. Pofition 53 0 47' f. following. 
CL2 3. <r Coronae 
