An enormous increase will occur if the sediment is disturbed, and conversely sedimentation and subsidence during storage will greatly diminish the numbers of bacteria.
Precipitation occurs, and with it sedimentationof the bacteria, as before.
Percy Frankland has demonstrated the same effect of sedimentation by storage as follows: No.
But, as Babes has pointed out, alum itself acts inimically on germs; in such treatment, therefore, we get sedimentation and germicidal action combined.
Sedimentation means merely placing the milk in conical glasses in a cool place for twenty-four hours.
Probably all these factors play a part in the self-purification of rivers, but we may take it that oxidation, dilution, and sedimentation are three of the principal agencies.
The water may be now either centrifugalised or placed in sedimentation flasks, and the deposit examined for bacteria.
As a matter of actual practice, however, sedimentation alone is rarely sufficient to purify water.
Erosion, Transportation, and Sedimentation performed by the Atmosphere, Jour.
When guided both by planes of sedimentation and planes of jointing, forms of a very high degree of ornamentation are developed.
Only a few miles northward along the railway from Devils Lake is Ableman, where, exposed in a high cliff, the hard purple quartzite with beautiful ripple marks to reveal its plane of sedimentation (pl.
The formation of these layers depends solely upon the rate of sedimentation of these elements, the rate depending partly upon differences in specific gravity, and partly upon the tendency the corpuscles have to run into clumps.
Horse's blood offers one of the best instances of the clumping of red corpuscles, and in this animal sedimentation of the red corpuscles is most rapid.
From these layers it spreads through the rest of the liquid, being most retarded, however, in the red corpuscle layer, and particularly so if the sedimentation has been very complete.
Intelligent users must at length realize this and demand for their own health not a purified water merely, but a primarily pure supply, safeguarded by sedimentation and filtration against occasional contamination.
Finally the long period of submergence, during which several changes in sedimentation had taken place, came to an end, and the area under discussion was again converted into land.
The conditions ofsedimentation finally changed in the area under consideration.
The first effect of the sedimentation which followed submergence was to even up the irregular surface of the quartzite, for the depressions in the surface were the first to be submerged, and the first to be filled.
If the land of southern Wisconsin remained low for a time after the uplift which brought the Paleozoic sedimentation to a close, weathering would have exceeded transportation and corrasion.
After sedimentation had proceeded to some such extent as indicated, the sea again retired from central Wisconsin.
The constitution of this formation shows that conditions of sedimentation had again changed, so that sand was again deposited where the conditions had been favorable to the deposition of limestone but a short time before.
Our least satisfactory knowledge of the Lake Superior ores relates to the peculiar conditions which determined the initial stage of sedimentation of the so-called iron formation.
In the selection of key horizons, knowledge of the conditions of sedimentation is very important.
Coal deposits are direct results of sedimentation of organic material.
Iron ores are represented in nearly all phases of the metamorphic cycle, but the principal commercial values have been produced by processes of weathering and sedimentation at and near the surface.
An ore formed by direct processes of sedimentation has sometimes been called primary, whereas an ore formed by later enrichment of these sediments has been called secondary.
It is supposed further that these organic participants were originally localized during sedimentation in so-called estuarine channels and shore-line embayments.
As in the case of the Clinton iron ores, no present-day sedimentationgives an adequate clue.
The exact conditions of original sedimentation present one of the great unsolved problems of geology, referred to in Chapter III.
The extent to which marine or brackish water conditions of sedimentation are requisite to the later formation of oil, as is suggested in the above quotation, has long been a debatable question.
Explain the processes employed for the removal of mechanical impurities of water by sedimentation and the use of chemicals.
Mechanical sedimentation and filtration greatly improve waters of this class, but do not necessarily render them entirely pure.
On the floors of the seas and oceans we have not only the region where the greater part of the sedimentation is effected, but that in which the work assumes the greatest variety.
This was followed by depression and sedimentation in Carboniferous times, and these Carboniferous times constitute the Second Marine Period.
To some extent a transportation of clays and associated materials occurs in lakes, but the chief processes there are of the nature of sedimentation accompanied by some amount of separation.
So far as clays are concerned, the action of the sea is both erosive and depository, though the sedimentation in it being that of the pelagic ooze at great depths the clayey material is quite inaccessible.
This small proportion is then subjected to further washing and sedimentation in order to obtain the china clay in a state of commercial purity.
The operators opened the wash out valves to the full extent and the sludge and liquor were discharged into the river about 70 feet away from the inlet to the sedimentation basin and on the downstream side of it.
The Dalecarlia Reservoir has a capacity of something like 2 days' storage, the Georgetown Reservoir the same, and the McMillan Park Reservoir nearly 3 days, making a totalsedimentation of more than 7 days.
The sedimentation tank was of sufficient size, when compared with the area of the experimental slow sand filter, to represent the Georgetown and McMillan Park Reservoirs when used in connection with the large filters.
In two cases, the preliminary treatment was rapid filtration, while the third consisted of sedimentation and coagulation.
Because of the increased viscosity of the water, sedimentation takes place less readily at lower temperatures, and inasmuch as sand filtration is partly dependent on sedimentation, the efficiency tends to fall off in cold weather.
The lands must be uplifted before they can be eroded, and since they must be eroded before their waste can be deposited, movements of elevation are a prerequisite condition for sedimentation also.
Both by sedimentation and by subsidence the trough had now become a belt of weakness in the crust of the earth.
The upridging of the Appalachians had begun and a wide continental uplift--proved by the absence of Permian deposits over large areas where sedimentation had gone on before--opened new lands for settlement to hordes of air-breathing animals.
Where oceanic currents are annually reversed by monsoons, sedimentation may be regularly varied, or interrupted, once a year.
After an estimate has been obtained of the total annual sedimentation at the present time, it is necessary to assume either that the average rate in past ages has been the same or that it has differed in some definite way.
Such changes interrupt and vary sedimentation in neighboring parts of the sea.
CO2 from the immediate environment of the cell, and (2) sedimentation occurring within cells; substances of higher density sediment in a gravitational field, and those of lighter density rise.
The directional growth of plant shoots and plant roots is probably due to this sedimentation phenomenon, particularly the effect on movement of auxins ([ref.
As a matter of economy of operation, it has been found desirable to take out from the sewage before the treatment already described as much of the solid matter as may be reasonably done, and for this purpose sedimentation is made use of.
The Mid-Atlantic Ridge is the major site of undisturbed pelagic sedimentation of the Atlantic because of its isolation from down-slope movements starting on the continental margin.
In contrast the rises receive only pelagic sedimentation, and thus the layering of their sedimentary cover is simple and widespread since it relates to major changes in pelagic sedimentation of past geologic ages.
An intermixture of softer rocks has eroded and become the basis for the sedimentation that has resulted in wider valleys between the ridges than are common in the remainder of the country.
The sedimentation process, moreover, raises river channels above the level of the nearby terrain.
Newbery, Schuchert and others have pointed out that there seem to have been great cycles of sedimentation which may be interpreted as due to the alternate success, first of the factors of elevation, then of those of degradation.
The lapse of time represented by this unconformability would thus be equivalent to that required for the accumulation of the three missing formations in those regions where sedimentation was more continuous.
The amount of sedimentation which has taken place in lakes and kettle-holes.
Columbia formation since Warmer climate than now, culmination of second probably due to greater Glacial epoch; Gulf Stream, formerly sedimentation in bays, permitted southern sounds, and estuaries.
Pasteur pipettes fitted with india-rubber teats will also be found useful for sedimentation tests when dealing with minute quantities of serum, etc.
When it is necessary to observe sedimentation reactions in very small quantities of fluid, these tubes will be found much more convenient than the 5 by 0.
Seal off the lower ends of the sedimentation tubes in the Bunsen flame.
Fill a sedimentation tube (by aspirating) or a teat pipette from the contents of each tube.
Again and again, throughout wide tracts, depression was in excess of sedimentation and elevation.
As the shelf is widened, sedimentation will become more and more effective, and in places may come to protect the land from further marine erosion.
It is obvious, then, that such areas are now dry land simply because, in the long-run, sedimentation and upheaval have been in excess of depression.
Here full play is given to sedimentation and marine erosion, while the latter alone comes into prominence upon shores that are washed by deeper waters.
Like its European parallel, it has been diminished by sedimentation and crustal movements.
And thus it can be shown that, within the continental plateau, movements of depression have been carried on more or less continuously during vast periods of time--and yet so gradually, that sedimentation was able to keep pace with them.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "sedimentation" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: deposit; precipitate; precipitation
