353 
of the Georgian planet. 
Table; but as the difference between any two degrees may 
be had by inspection, I have always used the nearest half 
degree. For instance, the quantities for the half degree be- 
tween three signs 21 0 and 22 0 , in the second, third, and fifth 
columns, will be 8o° 41/ ; 104° 45' ; and 4,76. And the same 
quantities will do for any day from March 7, 1787, till 
April 23, for which day the quantities must be taken from 
three signs 22 0 , &c. &c. 
Now, suppose it be required to ascertain whether a satellite 
called the second, which the 15th of March 1787, at 8 h 7' was 
observed to be five degrees south following the planet, was 
indeed the second satellite ? Then I see in the general list of 
calculated motions, that from February 16, 9 h 38' to March 
15, 7', is an interval of 26* 22 h 29'; in which the second 
satellite has moved o° 12' from its place ; and as it was then 
at 5 0 6', it is therefore now 5 0 18' from the ascending node of 
its orbit. 
In using the identifying apparatus, the first thing to be 
done is, the adjustment of the inner circle to the position it 
ought to have for the day of observation, which is pointed out 
by the geocentric longitude of the planet three signs de- 
grees ; the zero must consequently be adjusted to 8o° 41' 
north preceding ; I therefore turn the inner circle upon its 
centre, till the point 360 is opposite to 8o~° np ; for in the 
adjustment of the circles to each other, and in reading off the 
angles pointed out by them, a critical estimation of minutes 
has not been attempted ; whenever, therefore, minutes are 
given, they must be understood to relate to calculations, or 
to measures taken with a micrometer. 
In the next place, the point of the inner circle, answering 
MDCCCXV. Z Z 
