. Life and work at the Great Pyramid during the months of January, February, March, and April, 1865 : with a discussion of the facts ascertained . et the entrance passage close to, if notactually within, the subterranean chamber. Theentrance passage is indeed actually in a different ver-tical and meridian plane from the central axis, andwould therefore pass by it altogether, without con-tact,—but for the formers expansion, at its lowerend, into the subterranean chamber; on the floor ofwhich Colonel Howard Vyse and Mr. Perring haveaccordingly marked the place of the central verticalaxis of
. Life and work at the Great Pyramid during the months of January, February, March, and April, 1865 : with a discussion of the facts ascertained . et the entrance passage close to, if notactually within, the subterranean chamber. Theentrance passage is indeed actually in a different ver-tical and meridian plane from the central axis, andwould therefore pass by it altogether, without con-tact,—but for the formers expansion, at its lowerend, into the subterranean chamber; on the floor ofwhich Colonel Howard Vyse and Mr. Perring haveaccordingly marked the place of the central verticalaxis of the Pyramid produced. (See Plate iv.) Thequestion, therefore, now is,—standing at that pointof the floor of the subterranean chamber,—what isthe angular subtense therefrom, of the whole side ofthe Pyramid, in degrees of the Pyramid, or 250° tothe quadrant ? This question is fortunately very simple to com-pute ; for in the triangle A b c (Plate iv.), c b, thelength of the slant side of the Pyramid, or 7400British inches, is computed from the elements of thevertical height, angle at summit, and base-sidelength already given, in Division PI. 4-.
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