such as Ransom’s concrete, Portland stone, etc. They are made by a
mixture of cement, sand and gravel, and are molded into blocks. The
value depends upon the kind of cement. No really good lime for this
purpose has yet been found in the United States. The man who can
discover a calcareous deposit capable of making a good, silicious or
argillaceous hydraulic lime will have the market for manufactured stone
practically in his hands.