THE 
AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[THIRD SERIES] 
Art. I.— Results derived Jrom an examination of the United 
States Weather Maps for 1872 and 1873 ; by Extras Loomis, 
Professor of Natural Philosophy in Yale College. Srconp 
PaprER. With Plate I. 
(Read before the National Academy of Sciences, Philadelphia, Nov. 3, 1874.) 
Direction and velocity of the wind within areas of maximum 
pressure. 
In order to deduce from the weather maps the laws of the 
Wind's motion within an area of maximum pressure, I pro- 
ceeded in substantially the same manner as in the case of areas 
of low barometer, described in my first article, page 6 (see this 
Journal, July, 1874). I selected all those cases in which an area 
of maximum pressure, or high barometer, was so situated that 
which are designated as the north, east, south and west quadrants. 
Then beginning with the west quadrant, I counted the number 
of stations at which the wind was reported from the north, also 
the number of observations from the northeast, the east, south- 
fast, etc. ; and in like manner for each of the four quadrants. 
The velocity of the wind for the stations of observation in the 
different quadrants was also noted. The same was done with 
each of the weather maps which furnished an example suited to 
this comparison. The total number of cases derived from the 
Am. Jour. ee Series, Von. IX, No. 49.—Jan., 1875. 
