Section 93. As has been indicated, the right of municipal corporations to enter into contracts, is one of their usual and necessary powers, and in the absence of statutory or charter restrictions, they possess the same general powers as other corporations or natural persons to make contracts in furtherance of their corporate objects. The doctrine of law is well settled, that municipal corporations have all the powers of ordinary persons, as respects their contracts, except when they are expressly, or by necessary implication, restricted, and that they have all the powers necessary to carry out an expressly granted power.1

As the courts apply the general principles and doctrines of the law of contracts in the formation, interpretation and enforcement of municipal contracts, in the same manner and to the same extent as in other contracts between natural persons and private corporations, reference may be had to volume 3 of this work, where the law of contracts may be found treated.