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Knight's Mechanical Encyclopedia (ed. Knight), N. (search)
o expose the mucous membrane of the nose, and enable explorations and operations in cases of polypus, etc. See speculum. Nas-cale′. （Surgical.) A pessary of wool or cotton impregnated with a medicament for introduction into the vagina. Nat′u-ral steel. A steel obtained directly from the richer and purer kinds of ore by reducing them with charcoal and refining the cast-iron thus produced, so as to deprive it of a part of its carbon. It is principally used for making files and of what was afterward Grand Cairo, year Hegira 97. Citizen Langles has been employed in examining the various nilometers from Alouyah, above the cataracts, to Lower Egypt. He finds 15 between the isle of Elephantina and the mouth of the Nile. — Nat. Institute of France, 1800. The rise seems to have been less in former times than now. In the days of Moeris it is said that 8 cubits were sufficient; 15 or 16 were required in the time of Herodotus, 456 B. C. At the present day 18 cubits is co