Black.—The line of dashes indicates the position of the trough of low barometer, or the line of sudden change from easterly to westerly winds, with brief intervals of calm, shifts of wind in heavy squalls of rain or snow, colder, and, finally, clearing weather.
Red.—Positions and names of land stations and names and tracks of vessels plotted in red are those whose barometer curves are shown in the accompanying Barometer Diagram.
Blue.—The tracks of certain other vessels from which storm reports have been received are plotted in blue. In addition to these, however, storm reports have been received from the following vessels, omitted from the chart in order to avoid confusion:
Transatlantic steamships, westward bound: Glendevon, Lydian Monarch, St. Ronans, Werra.
Coasting steamships, bound south: El Monte, Morgan City, New Orleans. Bound north: Newport.
Sailing vessels off the coast from Montauk point to cape Cañaveral: Spartan, Charles H. Marshall, Caprice, Coryphene, Phebe, Isaac Orbeton, John H. Krantz, Arcot, Iroquois, Welaka, Serene, Warren B. Potter, Normandy, Lottie Stewart, Melissa Trask, Wilhelm Birkedal, Johanna, James S. Stone, Anita.
BAROMETER DIAGRAM.
Illustrating the fluctuations of the barometer from noon, March 11, to noon, March 14 (75th meridian time).
Barometer Curves.—As it is only practicable to illustrate graphically the barometer records of a few vessels and land stations, the following have been selected as being of special interest; the small circles mark the points of observation: