20 
at the Vernal Equinox in that year its Zenith Distance was 
about 57° 37’ 45”, namely, 90°—71° 11’ 15” the star’s N. 
Declination + 38° 49’ the complement of the Latitude. And its 
altitude above the Horizon was 32° 22'15”. At Sunset of that 
day it would be about 20° from the Zenith. 
Because the figures in the above table indicate 45'’-604 as the 
mean annual precession of « Urse Majoris, and because we have 
previously found that the difference of that star’s AR in 1897, and 
anno B.C. 888 is 127,170", we must in order to determine the 
number of years that have elapsed divide the latter by the former 
quantity. The quotient is 2,788, which is the same number that 
was afforded by the South mound and a Hydre. 
NORTH MOUND AND «@ CEPHEI. 
Let us now go to the North mound. The alignment from this 
leads to the East edge of No. 51, grazing the outer circle 
upright, No. 27. The angle this bears from the East is 120°, to 
which must be added 180°, because it is a star seen in the North in 
the Autumn when the East point will be changed. The angle is, 
therefore, 300° or 20" 0™ 0%, and this was I imagine at that 
time the ar of a Cephei, whose name Alderamin is a contrac- 
tion from the Arabic Al-dhira yemin, the right arm, and whose 
present AR is 21" 16™ 7**2= 319° 1’ 48". The difference being 
19° 1' 48" = 68508". 
The Right Ascension annual Precession and Declination of 
a Cephei now, and the same,at the time sought, and also 
corresponding particulars for two other stars taken from the 
Astronomical Observations made at the Royal Observatory, 
Edinburgh, are set out in the following table :— 
Right Ascension. Annl. Precn: Declination. Annl. Var. 
a Cephei ~ 319° 1’ 45” 21''15 (1°41) N. 62° 8'57 = 15'""1 
A.D. 1897 f (21° 16™ 7*-2) 
a Cephei ) 300° 0’ 0” 
B.c. 891 § 20° 0’ 0” 
