National Geographic : 1910 Jun
O A VIEW OF POAS WHEN SIMMERING Photo byJ.FidTristan The intervals between the eruptions are very irregular. Prof. J. Fid Tristan, whohas made several visits tothe geyser at different seasons of the year, writes that he rarely saw the geyser in the same condition asonaprevious trip. Sometimes it appeared entirely quiet, without an eruption for many hours; at other times itwas covered with clouds, the mist being so thick that one could hardly see farther than a few feet below theedge ofthecrater. At- other periods the eruptions were very frequent, and in some of them the column ofwater and steam reached several thousand feet.