The excess of heat received in equatorial regions expands the water, but at the same time excess of evaporation concentrates it, so that the density increases.
The magnetic concentrates contain enough zinc to be well adapted to the manufacture of zinc oxide.
Thus the election is virtually an electiov by states, and the struggle concentrates itself in the large states, where the great parties are often nearly equally divided, e.g.
Square, with free access to the river bank; the gravel and sand were washed in cradles provided with screens of perforated metal, and the concentrates were sorted by hand on tables by means of an iron scraper.
These are shallow cylindrical troughs containing muddy water in which the diamonds and other heavy minerals (concentrates) are swept to the rim by revolving toothed arms, while the lighter stuff escapes near the centre of the pan.
The concentrates are then passed over sloping tables (pulsator) and shaken to and fro under a stream of water which effects a second concentration of the heaviest material.
Until recently the final separation of the diamond from the concentrates was made by hand picking, but even this has now been replaced by machinery, owing to the remarkable discovery that a greased surface will hold a diamond while allowing the other heavy minerals to pass over it.
The other minerals found in the concentrates are pebbles and fragments of pyrope, zircon, cyanite, chrome-diopside, enstatite, a green pyroxene, mica, ilmenite, magnetite, chromite, hornblende, olivine, barytes, calcite and pyrites.
Phys , 8, p. 235) concentrates the urine and precipitates the urea by nitric acid.
Fresh knowledge, new forces and faculties, have to be acquired by positive and strenuous efforts, while, on the other hand, delusions and superstitions are to be abandoned by an attitude of conscious neglect; or to use the phraseology of the Hindus, Avidyd, nescience - the mental state of the unenlightened - through which the individual energies are scattered and dissipated in futile effort, is gradually replaced by Vidyd, the higher wisdom which dispels the darkness of the mind, awakens our latent faculties and concentrates our efforts in the direction of that harmonious union, which ultimately results in Nirvana.
Its charge of from 8 to 12 tons of ore or concentrates is slowly agitated at a rate of three revolutions a minute, and in from 24 to 36 hours it is reduced from say 40 or 35% 'to' 7% of sulphur.
In America the usual method is to roast ores or concentrates so that the matte yielded by either the reverberatory or cupola furnace will run from 45 to 50% in copper, and then to transfer to the Bessemer converter, which blows it up to 99%.
In Butte, Montana, reverberatories have in the past been preferred to cupola furnaces, as the charge has consisted mainly of fine roasted concentrates; but the cupola is gaining ground there.
Number in arithmetic, magnitude in geometry, stars in astronomy, a man's good in ethics; concentrates itself on the causes and appropriate principles of its subject, especially the definition of the subject and its species by their essences or formal causes; and after an inductive intelligence of those principles proceeds by a deductive demonstration from definitions to consequences: philosophy is simply a desire of this definite knowledge of causes and effects.
But this laudation of times past concentrates itself almost wholly on the person of the sainted king whom, while with feudal independence he had declined to swear fealty to him, "because I was not his man," he evidently regarded with an unlimited reverence.
The course of trade from 1880 to 1905 was as follows: The principal articles of export in 1905 were: Woo, £ 1 3,44 6, 260; gold, £3, o 53,33 1; silver and concentrates, £2,407,142;, lead, £I,072,858; butter, £817,820; coal, £I,565,602; copper, £I,280,599; breadstuffs, £1,345,589; leather and skins, £1,559,033; meats, £761,235; tallow, £464,330; timber, £353,265; tin, £466,049.
Built in part upon "made land," well protected by levees, and lying within the richest cottonproducing region of the south, the rich timber country of the St Francis river, and the Mississippi "bottom lands," Helena concentrates its economic interests in cotton-compressing and shipping, the manufacture of cotton-seed products, lumbering and wood-working.
It consists in half of a short focused parabolic mirror, which concentrates all the light coming from the one side on to the object.