Sections 148 to 171 of the Indian Contract Act, 1872 outline the provisions governing contracts of bailment, which involve the delivery of goods from one party (bailor) to another (bailee) for a specific purpose, with the expectation that the goods will be returned. The document details the essential elements of bailment, the duties and rights of both bailors and bailees, and outlines obligations such as care for the goods, return of goods, and disclosure of defects. Key principles include that a contract is necessary for bailment and that bailees must not use the goods unlawfully.