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See also:IVORY (Fr. ivoire, See also:Lat. ebur) , strictly speaking a See also:term confined to the material represented by the tusk of the See also:elephant, and for commercial purposes almost entirely to that of the male elephant . In See also:Africa both the male and See also:female elephant produce See also:good-sized tusks; in the See also:Indian variety the female is much less bountifully provided, and in See also:Ceylon perhaps not more than 1% of either See also:sex have any tusks at all . See also:Ivory is in substance very dense, the pores See also:close and compact and filled with a gelatinous See also:solution which contributes to the beautiful See also:polish which may be given to it and makes it easy to See also:work . It may be placed between See also:bone and See also:horn; more fibrous than bone and therefore less easily torn or splintered . For a scientific See also:definition it would be difficult to find a better one than that given by See also:Sir See also:Richard See also:Owen . He says: " The name ivory is now restricted to that modification of den-tine or tooth substance which in transverse sections or fractures shows lines of different See also:colours, or striae, proceeding in the arc of a circle and forming by their decussations See also:minute See also:curvilinear See also:lozenge-shaped spaces." These spaces are formed by an immense number of exceedingly minute tubes placed very close together, radiating outwards in all directions . It is to this arrangement of structure that ivory owes its See also:fine See also:grain and almost perfect See also:elasticity, and the See also:peculiar marking resembling the See also:engine-turning on the See also:case of a See also:watch, by which many See also:people are guided in distinguishing it from celluloid or other imitations . Elephants' tusks are the upper incisor See also:teeth of the See also:animal, which, starting in earliest youth from a semi-solid vascular pulp, grow during the whole of its existence, gathering See also:phosphates and other earthy matters and becoming hardened as in the formation of teeth generally . The tusk is built up in layers, the inside layer being the last produced . A large proportion is embedded in the bone sockets of the See also:skull, and is hollow for some distance up in a conical See also:form, the hollow becoming less and less as it is prolonged into a narrow channel which runs along as a See also:thread or as it is sometimes called, See also:nerve, towards the point of the tooth . The See also:outer layer, or bark, is See also:enamel of similar See also:density to the central 'Lecture before the Society of Arts (1856).See also:part . Besides the elephant's tooth or tusk we recognize as ivory, for commercial purposes, the teeth of the See also:hippopotamus, See also:walrus, See also:narwhal, cachalot or sperm-See also:whale and of some animals of the See also:wild See also:boar class, such as the warthog of See also:South Africa . I'racticalIy, however, amongst these the See also:hippo and walrus tusks are the only ones of importance for large work, though boars' tusks come to the See also:sale-rooms in considerable quantities from See also:India and Africa . Generally speaking, the See also:supply of ivory imported into See also:Europe comes from Africa; some is See also:Asiatic, but much that is shipped from India is really See also:African, coming by way of See also:Zanzibar and See also:Mozambique to Bombay . A certain amount is furnished by the vast stores of remains of prehistoric animals still existing through-out See also:Russia, principally in See also:Siberia in the neighbourhood of the See also:Lena and other See also:rivers discharging into the See also:Arctic Ocean . The See also:mammoth and See also:mastodon seem at one See also:time to have been See also:common over the whole See also:surface of the globe . In See also:England tusks have been recently dug up—for instance at See also:Dungeness—as See also:long as 12 ft. and weighing 200 lb . The Siberian deposits have been worked for now nearly two centuries . The See also:store appears to be as in-exhaustible as a coalfield . Some think that a See also:day may come when the spread of See also:civilization may cause the utter disappearance of the elephant in Africa, and that it will be to these deposits that we may have to turn as the only source of animal ivory . Of See also:late years in England the use of mammoth ivory has shown signs of decline . Practically none passed through the See also:London sale-rooms during 1903-1906 . Before that, parcels of 10 to 20 tons were not uncommon . Not all of it is good; perhaps about See also:half of what comes to England is so, the See also:rest rotten; specimens, however, are found as perfect and in as fine See also:condition as if recently killed, instead of having lain hidden and preserved for thousands of See also:year in the icy ground .
There is a considerable literature (see See also:SHOOTING) on the subject of big-See also:game See also:hunting, which includes that of the elephant, hippopotamus and smaller tusk-bearing animals
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Elephants until comparatively See also:recent times roamed over the whole of Africa from the See also:northern deserts to the Cape of Good See also:Hope
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They are still abundant in Central Africa and See also:Uganda, but civilization has gradually driven them farther and farther into the wilds and impenetrable forests of the interior
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The quality of ivory varies according to the districts whence it is obtained, the soft variety of the eastern parts of the See also:continent being the most esteemed
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When in perfect condition African ivory should he if recently cut of a warm, transparent, mellow tint, with as little as possible See also:appearance of grain or mottling
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Asiatic ivory is of a denser See also: See also:Siam ivory is rarely if ever soft . Abyssinian has its soft See also:side, but See also:Egypt is practically the only See also:place where both descriptions are largely distributed . A See also:drawback to Abyssinian ivory is a prevalence of a rather thick bark . See also:Egyptian is liable to be cracked, from the extreme See also:variations of temperature; more so formerly than now, since better methods of packing and transit are used . Ivory is extremely sensitive to sudden extremes of temperature; for this See also:reason billiard balls should be kept where the temperature is fairly equable . The See also:market terms by which descriptions of ivory are distinguished are liable to mislead . They refer to ports of shipment rather than to places of origin . For instance, " See also:Malta " ivory is a well-understood term, yet there are no ivory producing animals in that See also:island . Tusks should be See also:regular and tapering in shape, not very curved or See also:twisted, for See also:economy in cutting; the coat fine, thin, clear and transparent . The substance of ivory is so elastic and flexible that excellent See also:riding-whips have been cut longitudinally from whole tusks . The See also:size to which tusks grow and are brought to market depends on See also:race rather than on size of elephants . The latter run largest in See also:equatorial Africa .
Asiatic See also:bull elephant tusks seldom exceed 5o lb in See also:weight, though lengths of 9 ft. and up to 15o lb weight are not entirely unknown
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See also:Record lengths for African tusks are the one presented to See also:George V., when See also:prince of See also:Wales, on his See also:marriage (1893), measuring 8 ft
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71 in. and weighing 165 lb, and the pair of tusks which were brought to the Zanzibar market by natives in 1898, weighing together over 450 lb
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One of the latter is new in the Natural See also:History Museum at South See also:Kensington ; the other is in Messrs See also:Rodgers & Co.'s collection at See also:Sheffield
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For length the longest known are those belonging to Messrs See also:Rowland See also: Soft contains more moisture, stands See also:differences of See also:climate and temperature better, and does not crack so easily . The See also:expert is guided by the shape of the tooth, by the See also:colour and quality of the bark or skin, and by the transparency when cut, or even before, as at the point of the tooth . Roughly, a See also:line might be See also:drawn almost centrally down the See also:map of Africa, on the See also:west of which the hard quality prevails, on the See also:east the soft . In choosing ivory for example for See also:knife-handles—people rather like to see a See also:pretty grain, strongly marked; but the finest quality in the hard variety, which is generally used for them, is the closest and freest from grain . The curved or canine teeth of the hippopotamus are valuable and come in considerable quantities to the See also:European markets . Owen describes this variety as " an extremely dense, compact See also:kind of dentine, partially defended on the outside by a thin layer of enamel as hard as See also:porcelain; so hard as to strike See also:fire with See also:steel." By reason of this hardness it is not at all liked by the See also:turner and ivory workers, and before being touched by them the enamel has to be removed by See also:acid, or sometimes by See also:heating and sudden cooling, when it can be scaled off . The texture is slightly curdled, mottled or damasked . Hippo ivory was at one time largely used for artificial teeth, but now mostly for See also:umbrella and stick-handles; whole (in their natural form) for See also:fancy See also:door-handles and the like . In the See also:trade the term is not " riverhorse " but " seahorse teeth." Walrus ivory is less dense and coarser than hippo, but of fine quality—what there is of it, for the See also:oval centre which has more the See also:character of coarse bone unfortunately extends a long way up . At one time a large supply came to the market, but of late years there has been an increasing scarcity, the animals having been almost exterminated by the ruthless persecution to which they have been subjected in their See also:principal haunts in the northern seas . It is little esteemed now, though our ancestors thought highly of it . Comparatively large slabs are to be found in See also:medieval See also:sculpture of the 11th and 12th centuries, and the grips of most See also:oriental swords, See also:ancient and See also:modern, are made from it . The ivory from the single tusk or horn of the narwhal is not of much commercial value except as an See also:ornament or curiosity . Some horns attain a length of 8 to to ft., 4 in. thick at the See also:base . It is dense in substance and of a See also:fair colour, but owing to the central cavity there is little of it fit for anything larger than napkin-rings . Ivory in See also:Commerce, and its See also:Industrial Applications.—Almost the whole of the importation of ivory to Europe was until recent years confined to London, the principal distributing mart of the See also:world . But the opening up of the Congo trade has placed the See also:port of See also:Antwerp in a position which has equalled and, for a time, may surpass that of London . Other important markets93 are See also:Liverpool and See also:Hamburg; and See also:Germany, See also:France and See also:Portugal have colonial possessions in Africa, from which it is imported . See also:America is a considerable importer for its own requirements . From the See also:German Cameroon alone, according to Schilling, there were exported during the ten years ending 1905, 452,1.00 kilos of ivory . Mr See also:Buxton estimates the amount of ivory imported into the See also:United See also:Kingdom at about 500 tons . If we give the same to Antwerp we have from these two ports alone no less than l000 tons a year to be provided .. Allowing a weight so high as 30 lb per pair of tusks (which is far too high, perhaps twice too= high) we should have here alone between See also:thirty and See also:forty thoesand elephants to See also:account for . It is true that every pair of tusks that comes to the market represents a dead elephant, but not necessarily by any means a slain or even a recently killed one, as is popularly supposed and unfortunately too often repeated . By far the greater proportion is the result of stores accumulated by natives, a good part coming from animals which have died a natural See also:death . Not 2o% is live ivory or recently killed; the See also:remainder is known in the trade as dead ivory . In 1827 the principal London ivory importers imported 3000 cwt. in 1850, 8000 cwt . The highest See also:price up to 1855 was £55 per cwt . At the my sales in 1905 a record price was reached for billiard-See also:ball teeth of £167 per cwt . The See also:total imports into the United Kingdom were, according to See also:Board of Trade returns, in 1890, 14,349 cwt . ; in 1895, 10,911 CWt . ; in 1900, 9889 Cwt . ; in 1904, 9045 cwt . From Messrs See also:Hale & Son's (ivory brokers, to Fenchurch See also:Avenue) Ivory See also:Report of the second quarterly sales in London, See also:April 1906, it appears that the following were offered: Tons . From Zanzibar, Bombay, Mozambique and Siam 17 Egyptian . . 194 West Coast African . 11 See also:Lisbon I Abyssinian . 64 55 See also:Sea See also:horse (hippopotamus teeth) . 11 Walrus 4 See also:Waste ivory 1o4 674 Hard ivory was scarce . West Coast African was principally of the Gabun description, and some of very fine quality . There was very little inquiry for walrus . The highest prices ranged as follows: Soft East Coast tusks (Zanzibar, Mozambique, Bombay and Siam), 102 to 143 lb. each £66, 1os. to £75, 10s. per cwt . Billiard-ball scrivelloes, £104, per cwt . Cut points for billiard-balls (3k in. to 21 to 3 in.) £114 to £151 per cwt . Seahorse (for best), 3s . 6d. to 4S . Id. per lb . Boars' tusks, 6d. to 7d. per lb . Quantities of ivory offered to Public See also:auction (from Messrs Hale & Son's Reports) . 1903 . 1904 . 1905 . Tons . Tons . Tons . Zanzibar, Bombay, Mozambique and Siam 81 75 76 Egyptian . 494 724 811 Abyssinian 224 94 234 West Coast African 461 394 414 Lisbon . 3 3 1 s 2034 200 2244 Seahorse teeth and Boars' tusks . 7 94 74 2104 2094 2311 Fluctuations in prices of ivory at the London Sale-See also:Room (from Messrs Hale ee Son's Charts, which. show the prices at each quarterly sale from 1870) . 187o . 1880 . 189o . 1900 . 1905 . Billiard Ball pieces . . . . £55 £90 £112 £68 £167 Averages 30 38 50 29 48 Hard Egyptian 36 to 5o lb . . . Soft East Indian 50 to 70 lb . 67 55 88 57 72 West Coast African 5o to 70 lb . 36 57 65 48 61 Hard East African 50 to 70 lb . . 37 49 64 48 61 In See also:October 1889 soft East Indian fetched an See also:average of £82 per cwt., but in several instances higher prices were realized, and one See also:lot reached £88 per cwt . At the Liverpool April sales 1906 about 74 tons were offered from Gabun, Angola, and Cameroon (from the last 5 tons) . To the port of Antwerp the imports were 683o cwt. in 1904 and 6570 cwt. in 1905; of which 5310 cwt. and 4890 cwt. respectively were from the Congo See also:State . The leading London sales are held quarterly in Mincing See also:Lane, a very interesting and wonderful display of tusks and ivory of all kinds being laid out previously for inspection in the See also:great warehouses known as the " Ivory See also:Floor " in the London docks . The quarterly Liverpool sales follow the London ones, with a See also:short See also:interval . The important part which ivory plays in the industrial arts not only for decorative, but also for domestic applications is hardly sufficiently recognized . Nothing is wasted of this valuable product . Hundreds of sacks full of cuttings and shavings, and scraps returned by manufacturers after they have used what they require for their particular trade, come to the mart . The dust is used for polishing, and in the preparation of Indian See also:ink, and even for See also:food in the form of ivory jelly . The scraps come in for in-laying and for the numberless purposes in which ivory is used for small domestic and decorative See also:objects . India, which has been called the backbone of the trade, takes enormous quantities of the rings See also:left in the turning of billiard-balls, which serve as See also:women's bangles, 'or for making small toys and See also:models, and in other characteristic Indian work . Without endeavouring to enumerate all the applications, a glance may be See also:cast at the most important of those which consume the largest quantity . See also:Chief among these is the manufacture of billiard-balls, of See also:cutlery handles, of piano-keys and of brushware and See also:toilet articles . Billiard-balls demand the highest quality of ivory; for the best balls the soft description is employed, though recently, through the competition of bonzoline and similar substitutes, the hard has been more used in See also:order that the weight may be assimilated to that of the artificial kind . Therefore the most valuable tusks of all are those adapted for the billiard-ball trade . The term used is " scrivelloes," and is applied to teeth proper for the purpose, weighing not over about 7 lb . The See also:division of the tusk into smaller pieces for subsequent manufacture, in order to avoid waste, is a See also:matter of importance . The accompanying diagrams (See also:figs . 1 and 2) show the method; the cuts are made radiating from an imaginary centre of the See also:curve of the tusk . In after processes the various trades have their own particular methods for making the most of the material . In making a billiard-ball of the See also:English size the first thing to be done is to rough out, from the cylindrical See also:section, a See also:sphere about 2* in. in See also:diameter, which will eventually be 2 i/1g or sometimes for See also:pro- fessional players a lit- tle larger . One hemi- sphere—as shown in the diagrams (fig . 2) —is first turned, and the resulting See also:ring de- tached with a parting See also:tool . The diameter is accurately taken and the subsequent removals taken off in other directions . |
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