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A new and hitherto unknown atmospheric gas, a combination of oxygen and nitrogen, exists 10 to 25 miles above the Earth's surface, Drs. Arthur Adel and C.O. Lampland of the Lowell Observatory, Flagstaff, Ariz., announced to the American Association for the Advancement of Science at the Indianapolis meeting.
It is nitrogen pentoxide, its molecule consisting of two atoms of nitrogen and five of oxygen. It is probably the rarest of gases of the air, present only in the outer regions where the
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