Types of taiga. Installation of drill pipes in the oil field, oil fountain. Meeting of the Siberian Branch of the USSR Academy of Sciences with the participation of Academician M. A. Lavrentyev, S. L. Sobolev and other scientists. The scientists of the department work in laboratories. Academician M. Lavrentyev on vacation in the forest, with his students in the laboratory, during the test of the "hydraulic gun", gives interviews (synchronously) about the work of the Siberian Branch of the USSR Academy of Sciences.