The highest I saw could not have been above thirty feet, and did not last more than a quarter of an hour. The Strokker is the only spring, except the Geyser, which has to be approached with great caution. The eruptions sometimes succeed each other quickly, and sometimes cease for a few hours, and are not preceded by any sign.
Among the gushing springs the Strokker is the most remarkable. It boils and bubbles with most extraordinary violence at a depth of about twenty feet, shoots up suddenly, and projects its waters into the air. Its eruptions sometimes last half an hour, and the column occasionally ascends to a height of forty feet. I witnessed several of its eruptions; but unfortunately not one of the largest.