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HONE (in O. Eng. han, cognate with Sw...

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Originally appearing in Volume V13, Page 653 of the 1911 Encyclopedia Britannica.
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HONE (in O. Eng. han, cognate with Swed. See also:hen ; the See also:root appears in Skt. gdna, co to sharpen)  , a variety of finely siliceous See also:stone employed for whetting or sharpening edge tools, and for abrading See also:steel and other hard surfaces . Synonyms are See also:hone-stone, See also:whetstone, oilstone and sharpening stone . Hones are generally prepared in the See also:form of See also:flat slabs or small pencils or rods, but some are made with the outline of the See also:special See also:instrument they are designed to sharpen . Their abrading See also:action is due to the See also:quartz or See also:silica which is always See also:present in predominating proportion, some kinds consisting of almost pure quartz, while in others the siliceous See also:element is very intimately mixed with aluminous or calcareous See also:matter, forming a See also:uniform compact stone, the extremely See also:fine siliceous particles of which impart a remarkably keen edge to the See also:instruments for the sharpening of which they are applied . In some cases the presence of See also:minute garnets or See also:magnetite assists in the cutting action . Hones are used either dry, with See also:water, or with oil, and generally the See also:object to be sharpened is See also:drawn with See also:hand pressure backward and forward over the See also:surface of the hone; but sometimes the stone is moved over the cutting edge . The coarsest type of stone which can be included among hones is the See also:bat or See also:scythe stone, a porous fine-grained See also:sandstone used,-for sharpening scythes and cutters of mowing See also:machines, and for other like purposes . Next come the ragstones, which consist of quartzose See also:mica-schist, and give a finer edge than any sandstone . Under the See also:head of oilstones or hones proper the most famous and best-known qualities are the See also:German See also:razor hone, the See also:Turkey oilstone, and the See also:Arkansas stone . The German razor hone, used, as its name implies, chiefly for razors, is obtained from the See also:slate mountains near Ratisbon, where it forms a yellow vein of from 1 to 18 in. in the See also:blue slate . It is sawn into thin slabs, and these are cemented to slabs of slate which serve as a support . Turkey oilstone is a See also:close-grained bluish stone containing from 70 to 75% of silica in a See also:state of very fine See also:division, intimately blended with about 20 to 25% of See also:calcite .

It is obtained only in small pieces, frequently flawed and not tough, so that the slabs must have a backing of slate or See also:

wood . It is one of the most valuable of all whetstones, abrading the hardest steel, and possessing sufficient compactness to resist the pressure required for sharpening gravers . The stone comes from the interior of See also:Asia See also:Minor, whence it is carried to See also:Smyrna . Of Arkansas stones there are two varieties, both found in the same See also:district, See also:Garland and Saline counties, Arkansas, See also:United States . The finer See also:kind, known as Arkansas hone, is obtained in small pieces at the Hot Springs, and the second quality, distinguished as Washita stone, comes from Washita or Ouachita See also:river . The hones yield on See also:analysis 98% of silica, with small proportions of alumina, potash and soda, and See also:mere traces of See also:iron, See also:lime, See also:magnesia and See also:fluorine . They are See also:white in See also:colour, extremely hard and keen in grit, and not easily worn down or broken . Geologically the materials are called novaculites, and are supposed to be metamorphosed sandstone silt, chert or See also:limestone resulting from the permeation through the See also:mass of heated alkaline siliceous See also:waters . The finer kind is employed for fine cutting instruments, and also for polishing steel pivots of See also:watch-wheels and similar minute See also:work, the second and coarser quality being used for See also:common tools . Both varieties are largely exported from the United States in the form of blocks, slips, pencils, rods and wheels . Other honestones are obtained in the United States from New See also:York, New See also:Hampshire, See also:Vermont, See also:Ohio (Deerlick stone) and See also:Indiana (Hindostan or See also:Orange stone) . Among hones of less importance in See also:general use may be noted the Charley See also:Forest stone—or Whittle See also:Hill honestone—a See also:good substitute for Turkey oilstone; Water of See also:Ayr stone, Scotch stone, or snake stone, a See also:pale See also:grey carboniferous shale hardened by igneous action, used for tools and for polishing See also:marble and See also:copper-plates; Idwal or Welsh oilstone, used for small articles; and cutlers' greenstone from See also:Snowdon, very hard and close in texture, used for giving the last edge to lancets .

End of Article: HONE (in O. Eng. han, cognate with Swed. hen ; the root appears in Skt. gdna, co to sharpen)
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NATHANIEL HONE (1718-1784)

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