The ever-changing conditions of weather are in a manner photographed, and serve as guides for the work which immediately follows the making up of the charts. First the “synopsis” of conditions is made up, then the predictions or “indications” of the kind of weather expected, and the places where storm warnings are to be shown are determined, and in the form of a bulletin they are telegraphed to all parts of the country as the “Press Report,” to observing stations to be reproduced and furnished to local papers, posted in public offices and mailed to postmasters for exhibition in their offices, several hundred postoffices in some instances being supplied from one station. They are also placed in railroad stations and distributed from trains at points along their lines. Thus the people are advised of the kind of weather prevailing over the district of country in which they live, and informed of the changes that may be expected within twenty-four or forty-eight hours. “Observers” at their several stations publish in connection with the “indications” telegraphed from the central office, the conditions prevailing in their own localities, and in large cities where weather maps are hung in the rooms of boards of trade, merchants’ exchange, or other important offices, they place or change the symbols used to indicate the conditions at all the stations, as they receive them from reports passing them to the central office or repeated from the latter. The development and progress of all storms are as clearly delineated upon the charts prepared in the central office as it is possible for sensitive instruments to reveal them, and special attention is given to indications of high winds approaching the coasts. Orders are sent by telegraph to the maritime stations within a region likely to be visited by dangerous winds, and a “cautionary signal”—a square white flag with a square red center by day, or a red-center light by night—is displayed, remains out until notice is received from the central office that the danger has passed. This signal is used as the storm approaches. As the general direction of storms upon the Atlantic coast, or approaching it, is easterly or northeasterly, and the direction of the wind is circular and opposite to the motion of the hands upon a watch, with an inward tendency toward the “storm center,” as the storm departs from a station the wind will probably blow from the north or west, and a “cautionary off-shore signal,” a square white flag with square black center above the red flag, by day, or a white light above the red by night, may be ordered. Special record of the velocity of the wind is made at the stations when storm signals are ordered, and if it reaches twenty-five miles an hour the display of the signal is regarded as “justified.” These signals have become a necessity, and the occasions are exceedingly rare in which a vessel will leave port with one in sight until the captain or master has