United States Civil Service Commission announces examination for biologist, $6,435 to $12,210 (GS-9 to GS-14), biochemist, $6,345 to $12,210 (GS-7 to GS-14), physicist, $6,345 to $12,210 (GS-7 to GS-14) in field of radioisotopes, for duty in Veterans Administration, announcement 159B.