151. Work to be done on chattels.

The obligations of the custodian in the ordinary course of business are frequently varied and enhanced by the addition of a contract on his part to perform some act in connection with the chattels1. This additional undertaking raises a series of obligations between the owner of the chattel and the bailee which are collateral to the bare obligation of safe custody. In such cases a further undertaking on the bailee's part will be implied to exercise the appropriate capability, care and fidelity in the conduct of the particular employment for which the chattel was entrusted to him, for when