Volume 4: The Swiss Years: Writings 1912-1914
Page629(651 of 738)
SUMMARIES OF ETH COURSES 629 Laplacian is known, and that the field equations can be derived from the knowledge of this term and the form of the energy-momentum conservation law. He quoted the field equations and noted that the equivalence of inertial and gravitational mass follows from them and the conservation laws. He also pointed out that the equations are only covariant with respect to general linear transformations but that they are not generally covariant. Einstein concluded by emphasizing the drawbacks of his results: he had neither succeeded in writing these equations in a generally covariant form nor in specializing generally covariant equations in such a way that these equations follow.