Soil Mechanics and Foundation
In hydrometer analysis for a soil mass

meniscus correction is subtractive and dispersing agent correction is additive
both meniscus correction and dispersing agent correction are additive
meniscus correction is additive and dispersing agent correction is subtractive
both meniscus correction and dispersing agent correction are subtractive

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Soil Mechanics and Foundation
The total discharge from two wells situated near to each other is

greater than the sum of the discharges from individual wells
sum of the discharges from individual wells
equal to larger of the two discharges from individual wells
less than the sum of the discharges from individual wells

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