In the theory of motion of several coupled rigid bodies about a fixed
point one can distinguish three basic ramifications. 1. The first, the
so-called classical direction of investigations, is concerned with
particular cases of integrability ot the equations of motion of a single
rigid body about a fixed point,1 and with their geo- metrical
interpretation. This path of thought was predominant until the beginning
of the 20th century and its most illustrious represen- tatives are L.
EULER (1707-1783), J L. LAGRANGE (1736-1813), L. POINSOT (1777-1859), S.
V. KOVALEVSKAYA (1850-1891), and others. Chapter I of the present
monograph intends to reflect this branch of investigations. For
collateral reading on the general questions dealt with in this chapter
the reader is referred to the following textbooks and reports: A.
DOMOGAROV [1J, F. KLEIN and A. SOMMERFELD [11, 1, 1 J, A. G. 2 3
GREENHILL [10J, A. GRAY [1J, R. GRAMMEL [4 J, E. J. ROUTH [21' 2, 1
2 31' 32J, J. B. SCARBOROUGH [1J, and V. V. GOLUBEV [1, 2J.