Appendix 4—STABLE STRONTIUM IN BIOLOGICAL MATERIALS* (Micrograms Sr per gram Ca) A4.1 GRASS-SHEEP BONE COMPARISON Stable Sr Station Grass Sheep Ratio Cwmystwyth Vyrnwy Princetown 5000 1500 1700 730 470 470 0.15 0.31 0.28 Rookhope Norwich Boxworth 2800 2500 3400 650 520 930 0.23 0.21 0,27 Average 2800 630 0.24 Compare Bowen & Dymond (1955). Meadow plants (9 samples) ranged from 2200 to 6130. A4.2 A4.3 FEED-COWBONE-MILK COMPARISON AT READING Silage 2400 Straw Kale Concentrate 1300 3300 Cowbone Milk A4.5 520 330 COMPARISON OF LOWLAND AND HILL SHEEP (INCLUDING THOSE LISTED ABOVE AND OTHERS) No. Mean S.E. 8 10 710 530 78 64 Lowland Hill A4.4 2400 Ese” MILKT Source AERE MRC Frome Carmarthen Ballymoney 230 200 270 220 210 Carlisle Coleraine 410 280 420 350 Driffield Reading 240 330 250 OTHER FOODS (BOUGHT AT HARWELL) Cheese Potatoes Carrots Cabbage 550 2500 2900 Cereal (Farex) Flour Rice 2900 2200 2100 1550 (Compare Harrison et al. (1955): Mixed diet, including milk, 1700) A4.6 HUMAN BONES AERE MRC* Age No. AV. No. Ay. 0-6 mo. 1-18 y. >18 y. 7 10 6 210 280 390 7 9 18 200 230 265 *Results of Sowden and Stitch (1956) by activation analysis. *AERE results by Spectrographic Section, Woolwich Outstation, Chemistry Division, AERE. fResults by AERE (Spectrographic) and MRC (Harrison, activation). 229