National Geographic : 1905 Jun
3O 0° z .6-0 2 Black lines connect places having equal boetric c pressure; red lines connect places having equal tempera ture; arrows point in direction wind is blowing; figures 303 at end of arrows show wind velocity, when it is more than light. O clear; 6 partly cloudy; * cloudy; R rain; S snow. HIGH indicates center of anticyclone, or high-pressure area; LOW indicates center of cyclone, or low-pressure area. Large figures show average temperature in each quad rant of cyclone. Shading shows precipitation area of last 24 hours. CHART III.-Winter Storm, December 16, 1893, 8 A.M.