The fire-alarm boxes are large, ornate-looking affairs, placed on the corners of the principal boulevards and streets and in the public squares, and directions on the outside of these boxes inform you that, in addition to breaking the glass door (which automatically transmits the number of the box to the nearest fire station), you must also use the telephone inside and give a description of the fire, its character, size, and location (street number if possible); and it is necessary to go through all this proceeding before the sending of an alarm is considered complete. This alarm is received in the alarm- or "watch-room," of the nearest fire station. There an operator picks up a telephone receiver and listens for your description of the fire, and he decides, according to the message received, the number of pieces and character of the apparatus which is to answer the alarm. For example, if it is only a small fire--a window-curtain or a chimney--he simply orders out one piece of apparatus, an electric engine, such as was described above, or, perhaps, a _fourgon_--a sort of hose-wagon carrying a squad of men, short ladders, hose, and tools and appliances of all kinds. If, on the other hand, the call comes from a factory or a tenement district, where rescue work may be expected, he then sends two wagon-loads of men and the _grande-echelle_ (aërial ladder-truck), and if the fire appears dangerous, from the telephoned description, another ladder-truck and a steam fire-engine, or a motor-engine; but the engines are rarely used in Paris, as the water-pressure throughout the city is very fine, sufficient to reach the top of the average building; and the steamers are only sent out as a precaution, and are seldom put to work. The fire-hydrants in Paris, as in every other city in Europe, are of the "flush" or sunken character, instead of the post-hydrants used in our cities, and are found in depressed basins in the sidewalk, near the curb, protected with iron covers; and the location of these hydrants is carefully indicated by metal signs on the walls of the buildings near by, which not only point out the exact position of each hydrant, but tell the amount of water pressure to be found at that outlet--a feature that our firemen would welcome. All gas or electricity entering any building in Paris comes partially under the control of the fire-brigade, and the firemen carry keys on every piece of apparatus which enables them to open a small metal plate, always found at a certain spot in the sidewalks, and thus cut off either the gas or electric service from the building immediately on their arrival at a fire.