Observations of Vesuvius

From the vapors are allocated minerals, such as: hematite, copper chloride, etc., they cover rocks colorful bloom or fine crystals. At times, volcanic activity increases, opening up new holes, the allocation of the vapor increases, thrown stones and ashes, and there are even small lava flows. At this time and built up the crater due to the gradual accumulation of volcanic products. In one of these periods, it is from 1840 to 1850-ies., Scacchi produced observations of Vesuvius. We reported here a brief summary of the past few months, it is - the best way to present a picture of a mountain in the period in its activities. We followed a continuous volcanic activity for about two years. Almost all of the time it was restricted to the inner parts of the crater, and only on the last day, November 4, 1844, a strong lava flow has resurfaced. A lot of arguing about whether there is fire during eruptions. According to the old reports, he plays a big role, and especially clearly visible at night. Subsequently, however, were convinced that the phenomena are ascribed to the flame before actually occur due to reflection of the current lava, she illuminates a pair of clouds and produces the impression that the mountain of fire flies. But although a large scale phenomena of flame and are not observed, but in some cases, they are certain. A number of credible evidence indicates that out of the crater of the lava flows and from fumaroles release flammable gases; they and can form a flame, according to Siemens, is the ignition of flammable gases, especially hydrogen, plays an important role in the explosions.