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Show 1 Skyscraper! Need Solid Base Skyscrapers In New York city are built in two clusters, one on the lower tip of Manhattan Island and the other about four miles uptown up-town near the middle of the Island. The reason for this is the presence of bed-rock near the surface on both these portions of the island to form solid foundations for those hu.e structures. The ground between be-tween these two points was once a hi" marsh, since filled iu and covered cov-ered with buildings of lopr beignt and weight. It is unsafe for tl.e tall ones, which are inclined in itt!p because of unstable foundation. |