FOR THE MEASUREMENT OF EARTHWORKS, BY MEANS OF THE PRISMOIDAL FORMULA. ILLUSTRATED WITH NUMEROUS WOODCUTS, PROBLEMS, AND EX- FOR FINDING THE SOLIDITY IN CUBIC YARDS FROM MEAN AREAS. THE WHOLE BEING ADAPTED FOR CONVENIENT USE BY ENGINEERS, SURVEYORS, BY ELLWOOD MORRIS, CIVIL ENGINEER. PHILADELPHIA: T. R. CALLENDER & CO., THIRD AND WALNUT STS. 1872. |