  The Schwarzschild solution is generalized for the case of n internal
Ricci-flat spaces. It is shown that in the four-dimensional section of the
metric a horizon exists only when the internal space scale factors are
constant. The scalar-vacuum generalization of the solution is also presented.
[This paper is the English translation of the part of Chapter. 2.4 of the
author's PhD dissertation (Moscow, 1989).]
