Portland cement is made largely near Rochester.

Portland cement concrete if made with a non-porous aggregate is impervious to moisture, and yet at the same time, if not hydraulically compressed, will take up a sufficient quantity of moisture from the air to prevent condensation upon the surface of the walls.

The servants were authority for the report, that no earlier than the day before his death, he slipped and fell in the dining-room, and thereupon swore that he would have Portland cement floors put in before Christmas.