Table 69 - VARIABILITY OF Sr*? IN POWDERED MILK DURING A ONE-DAY SPRAY-DRYING OPERATION (Sampling date, 11/19/56; Location, Borden, Co., Columbus, Wisc.) Time Sr*°/g Ca, puc Start End of End of End of End of 8:35 am 9:35 am 11:35 am 1:35 pm 4.5 4.7 4.4 3.5 3.4 End of 8th hr: 3:35 pm End of 10th hr: 5:35 pm End of 12th hr: 7:35 pm 3.8 4.3 4.2 End of 14th hr: 9:35 pm End of run: 11:15 pm 5.9 5.1 lst hr: 2nd hr: 4th hr: 6th hr: Table 70 — VARIABILITY OF Sr*? IN MILK COLLECTED AT SIX WISCONSIN FARMS ON THE SAME DAY, AUGUST 1957 Farm Eagan : Morrow Ramsay Water Location source Sr*9/g Ca, puc Columbia Co., Wisc. Re. sver 6.77 + 0.25 Columbia Co., Wisc. River 4.76 + 0.72 Pond 4.89 + 0.28 Columbia Co., Wisc. Allen Columbia Co., Pond 5.77 + 0.04 Premo Wisc. Columbia Ca., Well 2.95 + 0.44 Lewke Wisc. Dane Co., Well 3.78 + 0.14 Wisc. 153