Adams, Walter M.  
The house of the hidden places: a clue to the creed of early Egypt from Egyptian sources — London, 1895

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v.] The Entrance of the Depths. i 71

other, we are compelled to recognize what is
called the Invariable Plane of the Planetary
System, the plane, that is to say, about which,
as La Place demonstrates, certain highly im-
portant relations between the masses and the
motions of the planets are always fulfilled.
Now this plane has never a greater inclination
than about 3° 6' to the apparent ecliptic, that
is, the plane of the orbit of the earth. But that
arc (3° 6') measures within a few minutes the
distance of the pole from the pole-star when
in conjunction, so to speak, with the Grand
Pyramid. When therefore the pole-star shines
down the entrance passage, its position in
regard to the pole (due allowance being made
for corrections), defines the limiting position
°f the invariable plane to the plane of the

Similarly in regard to the inconceivably
slow variation * in the inclination of the axis

* See the table and memoir published by the Smith-
sonian Institute of Washington.
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