LIST OF TABLES (Continued) Millicuries of Sr® Per Square Mile in U. S. Soil Samples Collected During October 1955, Depth Distribution of Sr® in Soil Sr® in Soil Collected Outside the United States . 29 30 30 31 Square Mile) Estimated from Gummed Film Measurements for Continental United States 34 owon +s 1956, and 1957 11 12a 12b 13 14 15 16 Geographical Distribution of Sr™ in Soil, 1955 Cumulative Sr*® Deposition (Millicuries Per Cumulative Sr®*" Deposition (Millicuries Per Square Mile) Estimated from Gummed Film Measurements Outside Continental United States Sr** Surface Air Concentration, Washington, D. C. Sr* Surface Air Concentration, Foreign Locations United States Public Health Service Stations Measuring Total Fission Product Activity in Air Samples Stratospheric Data, 1957 High altitude Sampling Data Sr® in New York City Tap Water 17a Sr® in Tap Water Collected by the University of Chicago 17b sr® in Tap Water Collected by the Lamont Geological Observatory 18 Mississippi River Water 19a Srin River Water Samples Collected by the University of Chicago . 19b Sr® in Reservoir and Precipitation Water Samples Collected by the Lamont Geological Observatory 20a Sr® in Sea Water Collected by the University of Chicago 20b Sr® in Sea Water Collected by the Lamont 21 22 23 Geological Observatory Radioisotopes in Surface Water Sea Water Samples Monthly Radiostrontium Levels |in Liquid Milk from 24 Monthly Radiostrontium Levels |in Powdered Milk 25 26 27 35 39 40 New York City 42 42 43 50 50 50 51 52 52 53 53 54 55 64 from Perry, New York 64 Other United States Locations Sr®™ in Milk Collected Outside the United States. 65 66 67 67 68 Monthly Sr® Levels in Powdered Milk from Public Health Service — Milk Samples 27a Radioactivity in Milk 28 Milk Analyzed at the University ‘of Chicago 29 Milk Samples Reported by the Lamont Geological Observatory . 30a Sr®° in Skim Milk Power 30b Sr® in Skim Milk Powder . 3la Cs'57 Determinations in Milk, 1956 31b Cs'8" Determinations in Milk, 1957-1958 . 31c Cs'37 Determinations in Milk 32 Sr®? in Canned Fish 70 71 71 72 74 86 87