So in considering the terminal station as a building, we must still give ear to the engineer. He must plan for the future, anticipate the number of persons who are to pass through this city's gate fifty years hence, and plan his concourse, so many square inches for each one of those future users of the terminal. Exits and entrances to the trains must be built in order that incoming and outgoing streams of persons shall not conflict. All these points require careful study. It is possible to design a baggage-room so bad as to make the station all but a failure; a stuffy ticket-office that is almost an impossibility to use under pressure conditions. The good engineer thinks two or three thousand times before he begins the design of a passenger terminal. The concourse, or head platform, that joins all the different track platforms is the main feature of the terminal building. Upon it some persons congregate preparatory to going through the gates to their trains, and other persons congregate awaiting the arrival of trains--a matter which is carefully bulletined for their convenience. Arriving and departing passengers, with a percentage of idlers, must be accommodated upon it. It must be capacious. Exits to the street should be provided, without the necessity of passing through the station building, and the carriage stand should be close at hand. The waiting-room will be the monumental and artistic expression of the terminal. It may or may not be a portion of the entrance to the concourse and train-shed, but it is essential that it be conveniently located, that smoking-rooms, women's waiting-rooms, parcel-check, telephone, telegraph, news-stand, and restaurant facilities be close at hand. It is hardly less desirable that the ticket-offices adjoin the waiting-room yet the architect who so places his ticket-offices that the belated traveller has unnecessary delay in purchasing his tickets, will bring down unnumbered curses upon his defenceless head. The modern station will make provision for numerous railroad offices--be a complete modern office-building in fact, although not emblazoning that in its architectural design--and will have lunch-stand and restaurant facilities, with their necessary addenda of store-rooms, refrigerators and kitchens, as complete as those of the largest hotels.