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Updated: July 17, 2025
The entrance to the upper passages was never forced from the entrance passage, but was accidentally found by the Arabs, after they had forced a long tunnel in the masonry, being in ignorance of the real entrance, which was probably concealed by a hinging block of stone. Or rather it rose at an angle of 23-1/2°, like the descent of the entrance passage, thus making angles of 47° and 133° with it.
These consist of large slabs of natural limestone set up on edge and not very closely fitted. The height of the slabs varies from 2 to 3 feet, and the diameters of the three still perfect circles are 23-1/2, 26-3/4, and 34-1/3 feet respectively. There is a possibility that the niches were originally roofed, but the evidence on this point is far from conclusive.
The Belvoir dog-hound is within very little of 24 inches instead of 23-1/2, the standard of twenty years ago, and this increase has become very general. In elegance of form nothing has been lost, and there can be no other to possess beauty combined with power and the essential points for pace and endurance in the same degree as a Foxhound. A detailed description of the Foxhound is here given:
The magnificent luminous train of this body, on October 15, the day of its nearest terrestrial approach, covered an arc of the heavens 23-1/2 degrees in length, corresponding to a real extension of one hundred millions of miles.
At that time the declination of the sun is 23-1/2° north of the equatorial line. It starts to decrease until, six months later, it reaches a minus declination of 23-1/2° and is that far south of the line. The longest day in the northern hemisphere is naturally June twenty-first." "And the shortest day when the sun has the greatest minus declination." "Precisely, at the winter solstice.
A "coudé," of 23-1/2 inches aperture and 62 feet focal length was in 1890 installed at the National Observatory, and has served M. Loewy for his ingenious studies on refraction and aberration above all, for taking the magnificent plates of his lunar atlas. The "bent" form is capable of being, but has not yet been, adapted to reflectors.
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