Pafnutii Lvovich Chebyshev as a mechanician

In this paper we present an original sketch about the works of an Academician of St. Petersburg Imperial Academy of Science (and Academies of other countries), the world-famous mathematician and mechanician P.L. Chebyshev (1821-1894). This sketch was made by a famous Russian specialist in nonholonomic mechanics, professor M.P. Yushkov. During several years (in the middle of 1990s) M.P. Yushkov was an invited speaker in Moscow State University, seminars devoted to the works of P.L. Chebyshev and the assessment and development of the ideas of P.L. Chebyshev. These seminars were organized by professor S.N. Kruzhkov. Here we present a small modern introduction and a sketch from one of this seminars.