The dawn of astronomy / A study of the temple-worship and mythology of the ancient Egyptians

by Sir Norman Lockyer

then, knowing that

t = Θ - a,

the formula may be written as follows:—

φ = h - p cos. t + ½{p²} sin. 1” sin.²t tan. h.

The Nautical Almanac gives tables to facilitate the computations involved, but greater exactness is obtained by direct computation.

[9] Since I left Egypt, in February, 1893, Captain Lyons has been good enough to comply with my request to repeat the observations. I give the following extract from his letter:—

"The mounds are only within a degree, as it is only the general direction which can be taken.

South mound old temenos wall, 289½° mag. bearing = 19½° N. of W.
Wall at right angles 189° mag. bearing = 71° S. of W.

Going to the West mound there are two higher humps with an opening between them, tons of limestone chips, sandstone blocks with Rameses II.'s name; so that I take this for the site of the great pylon. It is exactly opposite the obelisk, and distant, I should guess, 600 yards.

Site of S. pylon to obelisk, 106½° mag. bearing = 16½° S. of E.
Pole of N. pylon to obelisk, 109½° mag. bearing = 19½° S. of E.