JOURNAL OF SCIENCE AND ARTS.
ART. I.-Contributions to Meteorology, being Results derived from an examination of the United States Weather Maps and from other sources; by ELIAS LOOMIS, Professor of Natural Philosophy in Yale College. Fourth paper. With Plate.
[Read before the National Academy of Sciences, Philadelphia, Nov. 2, 1875.]
Movement of Areas of high barometer.
HAVING determined the average direction and velocity of movement of areas of low barometer within the limits of the United States, I desired to make a similar determination re
specting areas of high barometer. As I have in my possession only one Weather Map for each day, I have frequently found it difficult to follow the course of areas of high barometer from day to day, and have therefore confined my comparison to the monthly charts published by the U. S. chief signal officer. Among these I found three charts which gave the tracks of areas of high barometer for a month each, viz: Aug., 1873, Dec., 1874, and Jan., 1875. The following are the average courses and velocities of the areas of high barometer for these months:
AM. JOUR. SCI.-THIRD SERIES, VOL. XI, No. 61.-JAN., 1876.