The Second Scientific Seminar on Methods of Preparation and the Physicochemical Properties of Borides and Silicides, or~anizedby the Institute of Materials Science, Academy of Sciences of the Ukrainian SSR, the Institute of Metallurgy, Academy of Sciences of the Georgian SSR, and the Georgian Republican Council of the Scientific-Technical Department for the Machine Industry, was held in Tbilisi on May 19-21, 1975. It was attended by scientists and engineers representing 45 organizations in the Soviet Union, including the Moscow Institute of Steel and Alloys, the All-Union Scientific-Research Institute of Hard Alloys, the GNIIKhTEOS Institute, the Institute of High Temperatures (Moscow), the Ioffe Leningrad Physicotechnica! Institute, the State Institute of Applied Chemistry, the All-Union ScientificResearch Institute of Abrasives and Grinding, the Lensovet Leningrad Technological Institute, the S. M. Kirov Ural Polytechnic Institute, the Institue of Inorganic Chemistry, Academy of Sciences of the Latvian SSR, the Institute of Inorganic Chemistry, Siberian Branch, Academy of Sciences of the USSR, (Novosibirsk), the Lvov State University, the Scientific-Technical Department of the Termopribor Factory (Lvov), and the following Kiev organizations: the Intitute of Materials Science, Academy of Sciences of the Ukrainian SSR, the Institute of Metal Physics, Academy of Sciences of the Ukrainian SSR, the Kiev Polytechnic Institute, the KTIPP Institute, and the Kiev Institute of Labor Hygiene and Occupational Diseases. Altogether more than 80 papers and communications devoted to methods of preparation, investigations of the physicochemical properties, and applications of borides, silicides, and their alloys were read and discussed.