27 6 
Mr. Herschel on the 
Mr. South, and lately communicated to the Royal Society, 
will furnish a great many ; and Mr. Struve's immense col- 
lection, amassed in his reviews with the large refractor, as 
well as a collection of minute double stars encountered in my 
own 20-feet sweeps, and which will shortly be published, 
doubtless many more ; so that it is rather intended to give 
the following list as a specimen of a more complete one, than 
as including all, or nearly all, the stars it is desirable to exa- 
mine with this view. Meanwhile, to enable others not con- 
versant with algebraic symbols to extend the list for them- 
selves, if so inclined, I shall here set down the whole work 
of calculation for one star. 
Calculation for 35 Piscium. R. A. o h 6 ra = a, = i° 30' , 
Deck 7 0 49' N. Long. — I — 4 0 24'. Lat. = X = -|- 6 ° 32' ; 
Angle of position — tt = 298° 4' ; Distance = $= 12". 5. 
sin. obliqy. 
cos. R.A. 
-f 9-60012 
+ 9‘999 8 5 
(2) tan. (w — <t) 
sin. long. 
— II*09285 
8*884.90 
(1) cos. lat. 
(2) COS. (w— <r) 
+ 9’997 ! 7 
+ 8-90574 
(add) 
-19-97775 
(3) (add) cos.M 
+ 8-90291 
(1) ar. comp. ) 
cos. lat. 5 
-j- 0-00283 
( 1 ) 2 X log. sin. lat. 
+ 8-11214 
log. a 
tan. 30' 
+ 1*04798 
-J- 7-94086 
sin. a 
a 
7 T 
4 9-60280 
23 0 2 7' 
298 4 
(subtr..) tan. (© — l ) 
G — l 
l 
— 1 1-86561 
270° 47' 
4 24 
(add) 
(3) sin. M 
*4" 8*98884 
+ 9-99861 
7 T — cr 
274 37 
S O 
X © + 6 s 
Dates by Nautical 
Almanack 
275 11 
nr 11 
(subtr.) log. 2 a 
2 a 
+ 8-90023 
0*098 
yj a 1 
t Dec. 27 
( June 27 
If we wish to avoid the computation of the latitudes and 
longitudes which this supposes known, they may be taken 
with sufficient precision from any good map, or from a large 
celestial globe, as exactness is not required for this purpose 
in these elements. 
