Table 10 MONTHLY Sr?° LEVELS IN POWDERED MILK FROM COLUMBUS, WISCONSIN AND MANDAN, NORTH DAKOTA Columbus, Wisconsin Sr00 1957 pue/g Ca November December 1958 January February March April May June July August September Ootober November December 1 2 sro $r90 4h L236 # 0.37 he2 4.21 4 0.42 0035 0.33 Od Old 0.84 roo pre/g Ca sry (2) $r90 29.57 2 0.26 2 0.2 4el2 2 4.00 2 e762 e812 -9.19 4 Mandan, North Dakota (2) i 20-11 2 0.66 3.6 2 Ol 1.4 2 0.3 009 2 Ol 1.62 1.2 36.62% 062 --- 15.24 + 0.53 16.46 15.57 21.65 214630 26.28 * 0663 7 0.64 20.72 44.34 2 0.56 26.7h a Extrapolated to midpoint of sampling period. Buttermilk. - 64 - 1.52 7.62028 500 4.3 h.3 7.0 * 155 * 0.3 2 0.3 2 2.0 --- oro