The document discusses several equitable doctrines including conversion, election, satisfaction, and performance. The doctrine of conversion provides that equity treats property as if it is in the form intended by the owner, such as considering money directed to purchase land as the land itself. The doctrines of election and satisfaction deal with situations where a person receives a benefit from a will but is also subject to an associated obligation. The doctrine of performance allows an act other than what was originally required to be viewed as fulfilling an obligation.