The World's Columbian exposition, Chicago, 1893 . t nextdoor made by the famous Kimberley mines of South Africa. TheCape Colony commissioners, under whose supervision this displaywas made here andat the Paris Exposi-tion of 1889, recog-nizing what a greatattraction it has al-ways proven to thepublic, decided toshow at Chicaoroevery step and de-tail in the process ofdigging and prepar-inof diamonds for themarket. One seesthe hard blue unat-tractive diamond-bearinfr rock o-q intohuge pulverizers,then into sortingscreens, which turnout smooth, shiny pebbles ready for the lapidist. He deftly and q
The World's Columbian exposition, Chicago, 1893 . t nextdoor made by the famous Kimberley mines of South Africa. TheCape Colony commissioners, under whose supervision this displaywas made here andat the Paris Exposi-tion of 1889, recog-nizing what a greatattraction it has al-ways proven to thepublic, decided toshow at Chicaoroevery step and de-tail in the process ofdigging and prepar-inof diamonds for themarket. One seesthe hard blue unat-tractive diamond-bearinfr rock o-q intohuge pulverizers,then into sortingscreens, which turnout smooth, shiny pebbles ready for the lapidist. He deftly and quickly gives them atouch here and there with his rapidly revolving wheel until in the sunlight and emerge a finished gem. The rich mineral belts of the Mexican table lands and mountainsare to be found near the main south entrance to the a great cabinet collection of minerals, shown in elaboratebronze and glass cases, represents the combined contributions of adozen wealthy provinces, while native mining machinery, both. DIAMONDS. t5o MINUS. -Z>>4 ancient and modern, Is on exhibition indifferent sections of the court. The land of the Czars occupies a spacebeneath the gallery, and is representedchiefly by the irons and steels for which ilis so celebrated. Whole pictures inuniquely arranged polished sections ofthese metals adorn the walls. A trophyat the main west entrance affords someconception of Its products in mineral andmetal. Spain, that, besides a new world, hasbequeathed so many of the arts of miningand metallurgy, has an extensive series ofgeological maps and large collection ofeconomic minerals. The famous RioTinta copper mines and other great min-eral districts of the Pyrenees show a diver-sity of ores. Austria has exhibits of ex-cellent crucible steel and a panorama ofthe famous Carlsbad mineral w^ater carries off honors with the sulphursof Sicily and the fine statuary marbles fromCarrara. The South American Sta
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectworldscolumbianexpos
