**ANCIENT EGYPTIAN GEODESY - PART III**

**Based on excavations in 1865, Mahmoud Bey determined that
the streets of ancient Alexandria ran 24° north of due east, with cross streets
running at right angles 24° east of due south. The three most significant
Egyptian locales for Alexander the Great were Siwa, Luxor and the site he
chose for Alexandria. ****The azimuth of the great circle route from Alexandria
to Luxor is 156°. This is 24° east of due south, aligned with the axis of
the streets of ancient Alexandria. The azimuth from Alexandria to Siwa is
245°. This is 25° south of due west, within one degree of the alignment of
the streets of ancient Alexandria as reported by Mahmoud Bey.**

**The distance from Alexandria to Luxor is just under 410 miles.
The distance from Alexandria to Siwa is 300 miles. The distance from Siwa
to Luxor is 500 miles. Thus, the triangle formed by the great circle vectors
from Alexandria to Luxor and Siwa, and the vector from Luxor to Siwa, very
nearly form a perfect pythagorean 3-4-5 right triangle, with the right angle
in very nearly perfect alignment with the right angled axis of the streets
of ancient Alexandria.**