The Woods Hole Rapid Sediment Analyzer for sands is modified to be more rapid. Its modification, called a granulometer, can plot grain size distribution curves from 100 to 250 sand samples a day, that is 2500 to 6500 monthly or 30,000 to 75,000 a year. Sedimentation methods, owing to their technical improvements, represent a positive alternative to sieving for grain size analysis. They can offer a good source of data to be treated statistically by computer.

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