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Show Gold Under PtalLadelpliIa. Tho ground on which Philadelphia is built is one of tho richest gold fields In the world, says The Tunes of that city. This is a fact. Tho only difficulty is that the field cannot bo worked. Nearly tho whole city is underlaid with clay to the depth of about ten feet an area say ten miles Bquare. A cubic foot of clay, weighing 120 pounds, taken from a depth of fourteen feet when the cellar of tho Twelfth street market house was excavated, ex-cavated, was practically demonstrated to contain seven-tenths of a grain of gold, or one pound in 1,224,000, The experiment ex-periment was repeated with about tho same results with clay taken from a brickyard in the suburbs. Supposing j tho whole mass of clay to bo 4,180,000,-000 4,180,000,-000 pounds (and it is really much greater) the amount of gold would reach in value tho enormous sum of 120,000,000. Tho gravel is rnuch richer in gold than tho clay, but there is not so much of it. Undoubtedly Un-doubtedly 200,000,000 worth of gold lies witlun fifteen feet of the surface and still it cannot be used. |