C 38 ] 
that I could determine the Quantity of that Differ- 
ence with great Certainty. 
By the mean of 64 Obfcrvations, that were made 
of cc CaJJiope before the End of the Year 1728, I 
collect, after allowing for the -Preceflion, Aberra- 
tion and Nutation as in the foregoing Tables} that 
the mean Diftance of this Star was 68". 7 South of 
3 4°* 5 >', on the 27th Day of March 1727. By a 
like COmparifon of 40 Obfcrvations, taken of y 
Vr/£ Major is during the fame Interval of Time, I 
find this Star was, at the fame time, 3 9". 6 South 
ot 34 0 . 4f\ I carefully meafured, with the Screw 
of the Micrometer, the Diftance between the Points, 
with which thefe Stars were compared; and found 
them to be g'. 59" from each other, or one Second 
Ids than they- ought to have been. Hence it fol- 
lows, that the mean Difference of Declination be- 
tween thefe two Stars, was 10'. 2 8".i, on the 27th 
Day of March 1727. 
By the mean of 67 Obfcrvations, that were taken 
of /3 CaJJiope £> before the End of the Year 1728, 
this Star was 2y v .8 North of 32 0 . 20', on the 27th 
Day of March 1727 : and by the mean of 52 Ob- 
fervations, e Ur f£ Major is was 87". 6 South of 32 0 . 
so' at the fame time. The Diftance between thefe 
Points was found to be 9'. 79 7 . 3 > from whence it 
follows, that the mean Difference of Declination be- 
tween thefe two Stars was 1 ft. $i".7 on March 27th 
1727. 
By the mean of 100 Obfcrvations, taken before 
the End of the Year 1728, the mean Diftance of 
y ‘ Draconic was 7 9 y '.8 South of 38°. 25' on March 
27th 1727; and by the mean of 35 Obfcrvations, 
the 
