  I describe the methodology for the use of dispersion relations in connection
with chiral perturbation theory. The conditions for matching the two formalisms
are given at $O(E^2)$ and $O(E^4)$. The two have several complementary
features, as well as some limitations, and these are described by the use of
examples, which include chiral sum rules related to the Weinberg sum rules,
form factors, and a more complicated reaction, $\gamma \gamma \rightarrow \pi
\pi$. (Invited talk presented at the International Workshop on Chiral Dynamics
in Hadrons and Nuclei, Feb 6-10, 1995, Seoul, Korea)
