OCR Text |
Show HEIGHT OF THE CLOUDS. Measurement Shows They Are from One to Six Miles Away. When tho Illuminating tests of tho new high-preasure fountain In tho Schwartzenbergplatz, Vienna, wero made n rcmarkablo cone of light was I observed, appearing as though pro-! Jected by a scatchllght, sas tho London Lon-don Post. When this beam of light ' fell on a cloud an exceedingly bright spot appeared In tho heavens. Dr. Hhaden, assistant at tho Vienna observatory, ob-servatory, observing tho nnglo which tho bright spot made with tho horizon, had the happy thought of using It to detormlno tho height of tho clouds. A simple geometrical calculation permits per-mits of this and from n number of observations cloud heights wero deduced de-duced ranging from 1,550 to 10,070 meters, or from ono to six mllos ap-, proximately. A peculiar fact was that . sometimes during weather that was apparently perfectly clear a bright spot would appear In tho projection of the beam of light, showing tho pros-enco pros-enco of a stratum of lino vnpor, ordinarily ordin-arily risible with difficulty or entirely Invisible. On ono occasion this vapor stratum proved to bo moro than six and a half miles high. |