407946 Jorma -K.Miettinen Radioactive Food Chains in Arctic Regions. Fig.l. Weekly mean values of artificial aerosol beta- activity in ground level air in southern and northern Finland Liss The annual rainfall in Maarianhamina (20°E, 60°N) is 550 mm, in Ivalo (27,5°E, 68.5°N)450 mm. Fig.e. Picture of the lead shield used in the Finnish mobile whole body counter. The walls and the shielding door of the lead coffin are 4 cms thick, the 5 x 3 in. erystal is protected by 4 cms lead in 37 solid angle. The shield and electronics are installed in a Hanomag Kurier truck, The shield weighs 2 tons. Fig.3. Living areas of Finnish Lapps. The results for settled mountain Lapps (=reindeer breeders) and fisher Lapps are presented in Table III. RE