Show source of contamination milk palls aro are sometimes made with nith double bottoms bo be as to prevent rust ing the inside bottom is made of zinc tills this after a time may get a hole bole in it and ill then n it becomes a ver liable hotbed tor for propagation of gernis when the warm milk comes into tho the pall pail the air under the falso bottom expands is nill mill le ie noticed by the bubbles rising in the mill milk when the milk cools the air under the false fale bottom contracts and dran dras s milk be 01 tean acia the bottoms v herc her it can call never be nashed out here it nid is n or ort lant tant soulee of 0 f conill con a ill ii tia tion |