23 
a Andromedx during the required period. The result is again 
the same number that was obtained from each of the three other 
outlying signals, namely, 2,788 years. 
My reason for adopting 42:2963" as the mean annual pre- 
cession of « Andromede, sufficiently appears from the figures set 
out in the following table, which contains all the necessary 
particulars as to positions, &c., of a Andromedz now, and at the 
distant epoch about which we are concerned, and also those of 
two other stars that are entered in the Edinburgh Star Catalogue. 
Right Ascension. Annl. Precen. Declination. Annl.Var- 
a Andromede 46’-2 (308) N.28°31'19" 20"1 
A.D. 1897 
a Andromedez ) 328° 0’ 32” 
Bc. 891 f (21 52™ 2°13) 
8 Lacertz N.P.D. 50° 59’ 12” 
A.D. 1880 (22%30"31°) 39°87 (2°°658) N.39°0'48” 18°54 
3612 E.A.0.8.C. 
66 Cygni | N.P.D. 55° 33'50" 
Ap. 1890 (21"19"93*) 36-915 (2461) N.34°26'10" 14”-99 
3364 E.A.0.S.C. 
Then, wat 36°915 _ 39.3995 and ie +462 _ 49.9963 

Also, 18°54 + 14°99 = 16°765 and 1S 2a = 18-43 
“= 
The foregoing figures seem to show that the mean annual 
Precession of a Andromede during the last 2,758 years was 
422963". It also appears that the mean annual variation in Declin- 
ation was 18’:43, which would amount in 2,788 years to 51383” or 
14° 16’ 22”. Deducting this from 28° 31’ 19’, the present North 
Declination, we get 14°14’57”as the Declination N.of a Andromede 
2,788—90 yearsago. And, because the Equator passes through the 
East and West points of the horizon, above which at the Meridian 
it is raised as much as is the complement of the Latitude,—at. 
