Amendment to following announcements: Elementary teacher, no. 231, Occupational therapist, physical therapist, no. 233, Dental officer (intern), no. 252, Dietetic intern, no. 269, Engineer, no. 301, Aeronautical research intern, no. 313, Miscellaneous office machine operator, no. 334, Student aid trainee, no. 348, Social worker, no. 352, Park ranger, no. 359, Medical officer (rotating intern) (psychiatric resident) (general. practice resident), no. 4-40-3 (52), Student aid trainee, no. 4-34-4 (52), Airway operations specialist (communications), no. 9-67-1 (53).