Wear

• Errors of observation and experiment

• Errors of sampling

• Effect of different equipment and operation

It is evident that a reduction in sieve loading is more effective than prolonging the sieving. It is therefore recommended that the sample should be as small as is compatible with convenient handling. Although differences between analyses are inevitable, standardization of procedure more than doubles the reproducibility of a sieving operation. Sieve calibration increases this even further.

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