203This article contains a brief review of previous research; chiefly, however, new d&ta concerning the fall of the Tungus, central Siberia, meteorite on June 30, 1908: New testimony of eyewitnesses was collected by the author and others in 1928-32. A map of the region of the fall has been plotted. The meteorological QOIlditions on the morning of June 30, 1908, have been studied on the basis of data from meteor~ogical stations in central Siberia. The atmospheric phenomena accompanying the flight were studied with the aid ofbarograms from Siberian and European stations as well as seismograms recorded at Irkutsk. On the basis of sound phenomena and data supplied by barograms and seismograms, the moment of the explosion of the meteorite was determined

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