CYCLONES AND ANTICYCLONES. 
125 
prised me most, that they moved from the west 
toward the east quite regularly. The “ low ” would 
appear in the neighborhood of Biltish Columbia and 
move southwest to Illinois, then northeast toward the 
mouth of the St. Lawrence River, and finally pass 
over the Atlantic. Sometimes a “ low ” would come 
up into Lower California and move eastward along the 
Gulf to the coast. Another “ low ” would appear from 
the southeast in Georgia and pass up the coast toward 
Chesapeake Bay. Storms almost always accompanied 
these “ low ” centers. 
ISTow I wanted to find out about the forward move¬ 
ment of the storm center. For this purpose I studied 
the weather maps. November 1,1899, there is marked 
on the weather map a “ low ” in the region of Chesa¬ 
peake Bay. The same day there was a “ high ” near 
Winnipeg. The map for the next day shows that the 
“low” near Chesapeake Bay had moved northeast 
up the coast to the mouth of the St. Lawrence, and 
another “low” had appeared in southern Alabama. 
The “high” seemed to be developing two centers, 
one moving to the north of Lake Superior, and the 
other into Nebraska. 
By means of the scale on the map I measured the 
distance traveled by the “ low,” and found it to be 
five hundred miles in twenty-four hours, or 20.8 iidles 
per hour. Measuring these changes for a month, I 
found that the average distance per hour they trav¬ 
eled during the month of November was 23 miles. 
Mr. Ferrel gives 24.4 miles as the average velocity per 
hour for July, and for January, 30.8 miles per hour. 
