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Observations on the Accuracy of the Graduations of Babcock Skimmilk Test Bottles

Department of Dairy and Food Science, Cornell University, Ithaca, New York

ABSTRACT

Some time ago, we were asked if the instrument we had used to check the accuracy of Babcock milk test bottles could be used to test skimmilk bottles.¹ The bottles were to be used for the measurement of lipids in blood. Such measurements would require some modification of the instrument, but we agreed to try, and we have succeeded in measuring the errors in a set of 24 bottles.

So far as we know, there are no legal specifications governing the accuracy of such bottles, and no state agency examines skimmilk test bottles for accuracy. For that reason, we thought others might be interested in our data. We believe that the errors in the individual measurements do not exceed 0.2 division and, in most cases, the error is less.