Held, Section 2(9)(i) covers the workers who are directly employed by the principal employer. Expression "on the premises of the factory or establishment" comprehends presence of the persons on the premises of the factory or establishment for execution of the principal activity of the industrial establishment and not casual or occasional presence. In the present case, for the purposes of loading and unloading the milk cans, the truck driver and loaders appointed by contractors enter the premises of the Appellants but mere entry for such purpose cannot be treated as an employment of those persons on the premises of the factory or establishment as the said expression does not comprehend every person who enters the factory for whatever purpose. Appeal allowed.