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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)


Journal of Sedimentary Petrology
Vol. 38 (1968)No. 3. (September), Pages 878-884

A New Apparatus for Recording Particle Size Distribution

C. L. Bascomb


A manometer and sensitive capacitance transducer follow the drop in hydrostatic pressure at a point near the bottom of a column of soil suspension, during sedimentation. Current from the transducer is fed to a recorder, which traces an accumulation curve. The first derivative (slope of the curve) gives a summation curve of the particle size distribution.

Results on four soils with different particle size distributions agree with those obtained by a standard pipette-sampling/sieving procedure over the range 20-200ยต, effective settling diameter.

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