24 
Stonehenge 38° 49’ ; therefore at the angle 21" 52™ 2° or 328° 0’ 32”, 
which angle is removed from the East point 31° 59’ 28”, the Equator 
is raised above the horizon, or there is South Declination abcut 
19° 23’ 44”. 

For Log. Rad—Sine 31° 59’ 28” = T -7241019 
Log. Sine,.:. 58° 49’ 0” = 9-7971501 
Log. Sine ... 19° 23’ 44" = 9°5212520 
If we add to this the above found 14° 14’ 57", it appears 
that the altitude of a Andromede above the horizon at sunrise 
at the Vernal Equinox B.c, 891 was about 33° 38’ 41”, and its 
Zenith Distance 56° 21’ 19”, 
The star a Andromedz is one most easy to recognise, as it is 
the most Northern of the four stars which present that very 
remarkable diamond or trapezium of which the other three 
stars are in Pegasus, namely, on the Northern side Scheat, with 
Markab and Algenib defining the Southern side. 
DATE EARLIER THAN B.C. 890 PROBABLE. 
I have now shown how 2,788 years ago the two outlying stones 
and the two mounds may have guided the astronomers of 
that time, by the help of stars to which they pointed, to determine 
the precise days of the Equinoxes. And the fact that all the 
four alignments brought out the same date, viz., 2,788 years is 
very remarkable seeing that an error of one single second of time 
in the measurement of any angle of alignment would result in 
an error of one whole year, and the angles of alignment, the 
difference of ar’s, and the mean annual precessions vary largely 
with each star. 
But I feel sure that Stonehenge was erected before that date. 
And calculations which I have not yet completed tend to show 
that Stonehenge may have been raised a few years before B.c. 1000, 
i.e, about 2,900 years ago. Perhaps I could not expect to be able 
