18 
Declination 8. of a Hydra, we obtain the declination of this 
star 2,788 years ago, namely N. 0° 37' 41". And, because the 
Equator is at the Meridian always raised above the horizon by 
an amount equal to the complement of the Latitude, — at 
Stonehenge 38° 49’, and is not raised at all at the East and West 
points of the horizon, for it passes through them. Therefore, 
at the angle 7" 11™ 41° or 107° 52’ 46” from the true East, which 
was the ar of a Hydre 2,788 years ago, and which angle is 
removed from the Autumnal East point 72° 7’14”, the Equator is 
raised above the horizon about 36° 37’ 25". Or, in other words, 
there will be visible of the heavens about 36° 37’ 25” of S. 
Declination. 
For Log. Rad—Sine 72° 7’ 14” = T -9785022 
Log. Sine... 38° 490” = 9°7971501 
Log. Sine... 36° 37’ 25’= + 9°7756523 
We must, therefore, add to S, 36° 37’ 25” the above found 
N. 0° 37’ 41". Then it appears that the altitude of this star 
above the horizon at Stonehenge 2,788 years ago at sunrise at 
the Autumnal Equinox was 37° 15’ 06”, and its Zenith distance 
was 52° 44’ 54”, 
We have found that the difference between the aR of a Hydrz 
now and the same when long ago this alignment pointed to that 
star was 2" 11" 05 = 117907"'5. And from the above table we 
have obtained that its mean annual precession was 42'°285. 
Dividing the former by the latter the quotient is 2,788. And 
And we thus obtain the result that Stonehenge was built at least 
2,788 years before this present year A.D. 1897 ; that is to say, 
before B.C. 896. 
NORTH STONE AND € URSA) MAJORIS, 
Let us now take the North stone. The alignment from this 
signal proceeds to the middle of No, 51, grazing the edge of the 
trilithon upright, No. 58. The angle it bears from the East is 
