Composite samples of milk taken at several stages in the milk-pipeline and bulk handling system were tested for acid degree. It was apparent that a large part of the rancidity induced by the system studied had its origin in the plastic milk hose between the milking unit and the pipeline. This influence was compounded when a milk-metering device was placed in the line, possibly as a result of the additional length of milk hose required by its installation. The data further show that handling after the pipeline operation has no influence in the development of the rancid flavor beyond that already initiated in the pipeline itself or spontaneously present in the milk.

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Author notes

1Published with approval of the Director, Wyoming Agricultural Experiment Station, as Journal Paper No. 167.