| 单词 | fluor |
| 例句 | Check the ingredients on products you buy and watch for chemical names containing "fluor-." Specific trade names, such as Teflon and Gore-Tex, are also likely to contain PFAS. What are PFAS and why are these "forever chemicals" showing up in drinking water? 2023-06-26T04:00:00Z The fluor is believed to make skis faster as it creates a layer that repels moisture and dirt. Norway’s Mowinckel becomes first skier to be disqualified under new rule banning fluorinated wax 2023-10-28T04:00:00Z A name given to fluor spar in Derbyshire, where it is used for ornamental purposes. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z Spar, sp�r, n. a term applied by miners to any bright crystalline mineral, and adopted by mineralogists in the names of a number of minerals—calcareous spar, fluor spar, Iceland spar, &c.—adj. Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) 2012-01-30T03:00:19.113Z Fluor acid air is procured by dissolving the earthy substance called fluor in vitriolic acid. Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry 2011-10-11T02:01:05.817Z In every-day life many of them are unfamiliar; for example, natron, calcium, magnesia, chlorine, and fluor; the others, however, are known to every one; viz., iron, sulphur, and phosphorus. Popular Books on Natural Science For Practical Use in Every Household, for Readers of All Classes 2011-08-29T02:01:12.927Z When, therefore, silicious sand can be obtained, it will be found a more powerful flux to lead-ashes than either gravel, lime, spars, or any other substance, if we except the fluor spar. Scenes and Andventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas 2011-07-10T02:00:18.883Z An alum, as I presume, of a club shape, without any taste, seeming as it were dissolved in fluor, from the mountains to the north of the lake Skalk, near Kiomitis. Lachesis Lapponica A Tour in Lapland 2011-05-10T02:01:00.460Z Water thus saturated with ammoniac has usually been termed volatile alkaline fluor; we shall call it either simply ammoniac, or liquid ammoniac, and ammoniacal gas when it exists in the aëriform state. Elements of Chemistry, In a New Systematic Order, Containing all the Modern Discoveries It seems to consist of a peculiar acid vapour united to the stony substance of the fluor; for water being admitted to it absorbs the acid vapour, and the stony substance is deposited. Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry 2011-10-11T02:01:05.817Z In the same manner fluor and calcium are given to the teeth. Popular Books on Natural Science For Practical Use in Every Household, for Readers of All Classes 2011-08-29T02:01:12.927Z This locality is remarkable as yielding galena, heavy spar, blende, calcareous spar, fluor spar, pyrites, coal, and salt. Scenes and Andventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas 2011-07-10T02:00:18.883Z M. M. Metallic injections, partial cold bath, internal method as in the fluor albus above described. Zoonomia, Vol. II Or, the Laws of Organic Life There is a further remarkable mineral collection at the house, with fine specimens of sulphuret of tin and copper, malachite, fluor, crystals, topaz, with some blocks of prehistoric tin. The Cornwall Coast The nitrous acid may be exhibited in the form of air, as well as the vitriolic, the marine, and the fluor acids. Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry 2011-10-11T02:01:05.817Z It may be said, as to fluxes, generally, that they are intended to promote the fusion of the liquefying metals, and the elements used are the alkalis, such as borax, tartar, limestone, or fluor spar. Practical Mechanics for Boys Korable, remarkable for its many caverns, studded with crystals of translucent quartz and amethyst, the former, together with fluor and heavy spar, being met with, too, in the eastern parts of the mountain. Russia As Seen and Described by Famous Writers This I suspect to be the most frequent kind of fluor albus; the former one described at Class I. 1. Zoonomia, Vol. II Or, the Laws of Organic Life With ores that produce a thick slag the addition of 5 grams of fluor spar will be an advantage. A Text-book of Assaying: For the Use of Those Connected with Mines. This happens, for example, when green crystals of fluor spar afford blue reflections of light. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World This deportment of fluor spar determined Stokes in his choice of a name for his great discovery: he called this rendering visible of the ultra-violet rays Fluorescence. Six Lectures on Light Delivered In The United States In 1872-1873 We have strata made solid by the formation of fluor, a substance not soluble, so far as we know, by water. Theory of the Earth, Volume 1 (of 4) These are also much recommended in gleets, and in fluor albus, perhaps more than they deserve; they give a violet smell to the urine, and hence probably increase the secretion of it. Zoonomia, Vol. II Or, the Laws of Organic Life A wide-mouthed clay pot is taken and a little fluor spar added. A Text-book of Assaying: For the Use of Those Connected with Mines. I visited the noted locality of fluor spar in Pope County, Illinois, and crossing the mountainous tract called the Knobs, rejoined the party at the Saline. Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers The nitre," he said in one note, "seems to do harm; the fluor composition seems the best and hardest. Men of Invention and Industry This is the fluor acid which volatilises the siliceous substance. Theory of the Earth, Volume 1 (of 4) It is useful in the diab�tes by exciting the absorbents of the bladder into their natural action; and combined with resin is esteemed in the fluor albus, and in gleets. Zoonomia, Vol. II Or, the Laws of Organic Life For the assay of pyromorphite the following charge may be used:—Ore, 20 grams; "soda," 25 grams; tartar, 7 grams; and fluor spar, 5 grams; and 2 grams of borax as a cover. A Text-book of Assaying: For the Use of Those Connected with Mines. In the former case it is probable there are many other vapours which may precipitate it, as marine acid gas, or fluor acid gas. The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation Among these black schorl or tourmaline, actinolite, zircon, garnet, and fluor spar are not uncommon; but they are too sparingly dispersed to modify the general aspect of the rock. The Student's Elements of Geology "Turner's test" is a mixture of 5 parts of bisulphate of potash and 1 part of fluor spar. A Text-book of Assaying: For the Use of Those Connected with Mines. Fluor acid which being washed away and meeting with calcareous earth produces fluor or cubic spar. The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation Mix with 20 grams each of powdered lime and fluor, 15 grams each of powdered glass and borax, and 5 or 10 grams of nitre. A Text-book of Assaying: For the Use of Those Connected with Mines. If it met with the fluor acid it became fluor; if with the siliceous acid, flint; and when mixed with clay and sand, or either of them, acquires the name of marl. The Botanic Garden A Poem in Two Parts. Part 1: the Economy of Vegetation |
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