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    A Direct Method for Plotting Grain Size Curves from Hydrometer Test Data

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    This report describes a method by which the time required to draw a grain size curve from hydrometer test data is reduced from approx 20 min to less than 5 min per sample. Briefly, this method consists of the plotting of elapsed time and uncorrected hydrometer readings directly onto a grain size graph by the use of a transparent grid mounted on a tracing table. The construction of the grid is described. Because accepted methods of computation are used throughout, no approximations are introduced.

    Author Information:

    Dick, RC
    Senior Laboratory Technician, Caseco Consultants Limited, Vancouver, B. C.

    Committee/Subcommittee: D18.03

    DOI: 10.1520/STP38492S