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This method measures the height of foam developed by pouring. The action is intermittent, time being alloted strictly for foam decay, as well as for foam generation. Comparative or duplicate tests can be prolonged indefinitely, or until a steadied state is reached. Tests on solutions may be carried out at various temperatures and in the presence or absence of soils, or foamicides, that may be added at any time. Foam heights can be measured with reasonable precision.
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KELLY et al. (1966) studied this question.
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