A size-frequency curve is often convenient to use in conjunction with a cumulative curve in the analysis of a sediment. The sediment sample is run through a series of sieves and the cumulative curve plotted from the obtained data by using standard techniques. The points of interest between the plotted points are then interpolated from the curve and the data used to plot a size-frequency curve. By this method a size-frequency curve can be drawn which favorably compares to one drawn from data determined by running the sediment through a more complete set of sieves. This method is very time-saying and sufficiently accurate, giving the desired information at any critical points of the size-frequency curve.

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