i Table III. Body burden of 1los in Lapps at Inari, and in @ control group in Helsinki, Finland, in October 1961-April 1964 (age group 20-50 years) ne Males: | Lapps,Inari: Reindeerbreeders (Number of subjects) chek Reindeer breeding fishers | Lapps of other occupations Boarding school pupils 10/61 5/62 171os 9/62 3/63 . 27h 498 «307-65 115 322 189 (33) (3) 157 (20) (16) =187 (4% 4/64 (9) (4) 132 (10) 4O4 62) (430)-— (+25) (2) 205 (4) (11) (5) (13) 4g 83 68 140 (11) (21) (9) (8) 17,9 16,4 (5) (25) 205 hes (4% spr. spr. 62) 105 (4122) (10) 863 | (+168) (11) (+10) 591 (+216) (6) (+68) - - (+105) 33 (+312) (+79) 580 (+145) Controlgroup,Helsinkt Adult males: 8,4 ~8 (5) Females Reindeer breeders Reindeer breeding fishers Lapps ot other occupations Boarding school pupils 125 237 (21) (10) (2) 60 137 83 (4) 143 (1) (6) (1) 56 71 84 (4) (6) (2) (2) 40 64 70 82 (13) (9) =(8) (7) (6) (+4) (2) 128 414 (+202) (4) (+60) 3290 (+363) (2) (+28) - (+188) 18,6 - Control group, Helsinki : Adult females _ 3,2 ow (6) 1l 9,3 11,5 (5) (25) (24) (+365)