The testing of capacity measures

R.Y. Ferner
1913 Journal of the Franklin Institute  
and Washington. Quite a number of other States considered bills, and the prospects are encouraging for considerable progress at the next legislative sessions. The conference has long been in favor of the passage of a law to establish a standard barrel for all dry commodities shipped from one State to another. Such bill was introduced into Congress at its last session. Bureau of Standards. THIS paper describes the methods used for determinations of the volume of capacity measures, varying from
more » ... e precision test of high-grade primary standards for State governments to the rough determinations by linear measurements of the dimensions of the measure. The precision test is applied to measures used as standards by State and city sealers of weights and measures arm as master measures in manufacturing plants. The ,determination is made by weighing the amount of water contained in the measure, and from tables of water weights the correction of the measure is determined. Precautions to be observed in the filling and weighing of the measure are noted, and tables and charts are given for the rapid computation of the results. The method can be used to a~n accuracy of from one part in 5o,ooo to one in ioo,ooo. Factors that may be omitted in the application of this method where less accuracy is required are pointed out. For determinations to an accuracy of from one part in 500 to one'in IOOO the method of pouring water from a standard to the measure under test is used, and precautions to be observed in the manipulation are given. For the test of rougher measures, particularly of dry measures which will not hold water, tests are made with seeds as a medium. Results are given of a series of experiments made to determine which kinds of seeds are the best for this purpose. For the smaller measures the small *A paper read at
doi:10.1016/s0016-0032(13)90587-1 fatcat:ipox6uhc65grle6zkq46ucaopi