Section 2 (9) of the Act which defines the expression 'employee ' during the period in question read thus: 966 "2(9)" employee" means any person employed for wages in or in connection with the work of a factory or establishment to which this Act applies and (i) who is directly employed by the principal employer on any work of, or incidental or preliminary to or connected with the work of, the factory or establishment whether such work is done by the employee in the factory or establishment or elsewhere: or (ii) who is employed by or through an immediate employer on the premises of the factory or establishment or under the supervision of the principal employer or his agent on work which is ordinarily part of the work of the factory or establishment or which is preliminary to the work carried on in or incidental to the purpose of the factory or establishment; or (iii) whose service are temporarily lent or let on hire to the principal employer by the person with whom the person whose services are so lent or let on hire has entered into a contract of service; and includes any person employed for wages on any work connected with the administration of the factory or establishment or any part, department or branch thereof or with the purchase of law materials for, or the distribution or sale of the products of, the factory or establishment; but does not include (a) any member of the Indian naval, military or air forces, or.