anism gives warning of danger and its direction. Electricity, of course, has an important part in all these functions, and the cables for distributing this force measure more than two hundred miles on each of these vessels. A complete system of telephones to all parts of the liner is installed, and just as easily as the passenger from his stateroom sends his order to the stewards, the lookout far up in the "crow's nest" forward tells the officers on the bridge what is ahead. Between stem and stern, cellular bottom and mastheads, almost every art and calling has

contributed its share, and engineering records have been eclipsed in solving problems more difficult than those encountered in other professions.

There are two electric elevators in the center of each ship for the use of passengers, and six others are installed for the handling of mails, baggage and express matter. The provision for natural light is very complete; there are 1,200 windows and sidelights, including five hundred ventilating lights.

Some idea of the enormous size of these steamers may be gathered from the

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BOUT twelve miles from the city of Baltimore, on the Patapsco river, there is now nearing completion what is probably the most extraordinary power plant in the United States, if not in the world.

This plant, which is being built for the Patapsco Electric Power Company, by the Emmerson Ferro Concrete Construction Company, of Boston, is a radical departure from the usual methods of hydro-electric construction. Briefly speaking, the dam and power house are one; in other words, the dam is made

hollow and the interior, which is about two hundred feet long and twenty-eight feet wide, is utilized for the generating machinery.

At the present time the equipment of the plant consists of two alternators, direct connected to two five hundred horse power horizontal turbines. This will be shortly enlarged by the addition. of another turbine and alternator of equal power, bringing the total horse power of the plant up to fifteen hundred.

The Patapsco Company in the past has been operating a smaller plant, located at Gray's Mills, about two miles from their present location; this plant was inadequate to the rapid growth of the com