Stiff gravelly clay will require finer sieving or repeated washing to rid it of some of the grit or sand.
Light mullers are employed to pound, or to press together, the crushed grains for a given length of time, and then sieving machinery completes the operation by taking out the dust from the more palpable grains.
Farther on I saw in a dry river bed a man sieving gravel in an ingenious way.
The trouble in sieving gravel is that if the sieve be filled to its capacity the shaking soon becomes tiring.
And as I stand there in the doorway, looking at that silvery corn drift, I think of the whole process, from seed sown to the last sieving into this tranquil resting-place.
His part is to attend the sacking of the three kinds of grain for ever sieving out.
The hurds for the first test were not sieved to remove sand and dirt, but the resulting paper was so dirty that sieving was practiced in all subsequent tests.
The excessive amount of dirt and sand suggested the sieving of the hurds before cooking, and this was performed in all subsequent cooks.
Should further work show that the first two reasons need not be taken into consideration, the third objection might be overcome by sieving the hurds before baling.
The former apparently requires only a moderate sieving to remove sand and chaff, which operation doubtless would require only a small amount of labor and the installation of some simple machinery of low power consumption.
Indeed, the cocoa powder is so fine that in spite of all precautions a certain amount always floats about in the air of sieving rooms, and covers everything with a brown film.
Then did a bit of soil sieving and then did burning of soil in a bunsen burner.
On the same estate fine sieving in the preparation of pale crepe has been abandoned as an unnecessary refinement.
In view of the presence of the fine particles of dirt, to which allusion has been made, fine sieving of the latex appears to be essential, especially when sheet-rubber is to be prepared.
The sieve's perforations are wide enough to admit the small seed of the 'caracol,' and she separates the two qualities by the ordinary process of sieving the small and retaining the great.
In that outhouse a group of dark divinities are engaged in the difficult process of sieving and sorting.
