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CRANES AXD DERRICKS. 



The upper figure shows a floating derrick, the lower right-hand figure a combined derrick 



and Weicrhinor rnarVlinp nnrl tVio I^^TOT- loft V.or^l fi^r,^^ o r-^ 11o^ oV.oa^lo.rrc. ,,rV,,VVi ,'e o 



