Show auroras forty miles alleg nigh the scientists of the royal danish academy have hake made public the results of some interesting experiments which were conducted for the sole purpose of ascertaining the exact or at any rate the approximate height of the aurora borealis orealis li at godthaab M adam paulsen with two theodo lites situated only four miles apart found that the height of different di displays plays varied from one to forty miles 1 sear near cape farewell with a base line of three fourths of a mile in length the best calculations obtainable placed different aurora at from one to ten miles in height at spitzbergen Spitz bergen it was shown that they range from a height of one third of oan a mile to eighteen miles in this case it will not prove uninteresting to mention some of the remark ble opinions entertained by the early experimenters peri menters in this line flogel estimated the height of the various aurora observed by him at from go 00 to miles above the earth reimann found that one observed by him was at least COO miles high and earlier deductions gave such phenomena an all average height of miles then leem came forward with the announce ment that he had taken notes and observations ions on an display that was not separated from the earth by more than 1000 feet while hildebrand son concurred to the extent of declaring that many of the displays were below the clouds st louis republic |