One Thousand Ways to Make Money by Page Fox

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.