Height of the "Arora.—Interesting particulare concerning recent attempts to measure the height of the aurora have been given to the Royal Danish Academy by M. Adam Paulsen. At Godthaab, with two theodolites 4 miles apart, the height of different aurore was found to range from mile to 40 miles; near Cape Farewell, with a base line of about J mile, the calculations ranged from 1 to 10 miles and at Spitzberyen, with a base of about }imile, the results were from mile to 18 miles. In curlier observations, Flogel estimated the height of several aurora at from 90 to 300 miles, Reimann found a
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