Short description: In Russian (ask us if in doubt). The International Congress of Engineers in San Francisco on the occasion of the International Exhibition of the Panama Canal. Leontovsky P. On the determination of the safety of coal under the tunnel and the yellow road. Prof. Ivanov L.L. Geological profile on the line of a tunnel planned near Ekaterinoslav on the third section of the Merefa-Kherson line. Steber E. Gryazev volcanoes and the origin of oil. Gembitsky S. The eruption of Djau-Tepe. Tanatar I. On the causes of volcanic eruptions. SKUalbacd1841392614167.