Figure 72. Pycnometers for the measurement of the density of sediments.
According to Thoulet, the apparent density of a sediment is the weight per cm
cubed of the dry sediment when compressed as much as possible. The true densit
y is the relation of the weight of the sample relative to the weight of an equal
volume of distilled water at 4C. Thoulet studied these sediment properties.
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