6 E. Loomis—Resulis derived from an examination of the 
ceeded two inches. The successive positions of the-center of 
minimum pressure are indicated by the figures 19-2, 19°83, 201, 
etc., and the undulating line connecting these points represents 
the ‘path of the center of minimum pressure from October 19th 
to October 22d. The arrows at the several stations represent 
the direction of the winds for October 19th, 11 P. m., which 
was the time of commencement of the rain-fall represented 
upon the map. 
This example presents a very unusual case of a storm center 
traveling for several days toward the northwest. This result 
was appercuky produced by a wind of unusual —_ setting 
in from the Atlantic Ocean, and meeting with o 
from the interior caused a very unusual rain-fall, and lie center 
of minimum pressure followed the center of the rain-area. 
These facts seem to indicate that a heavy rain-fall extending 
over a large area has a decided influence in determining the 
course of a storm center. 
In No. 26 the principal rain-fall was on the northwest side 
of the center of minimum pressure but not over 150 miles from 
it. In No. 53 the principal rain-fall was on the southwest side 
of the center of minimum pressure, and these two cases, 
together with No. 12 on page 15 of my last paper, indicate 
that in the neighborhood of Kentucky it is not uncommon for 
the principal Ser to occur after the center of low pressure 
as pas eastw 
In Nos. 40 ae 49 the rain-fall at Cape May was aig than 
at any other station, but there was at the same time another 
rain-area of much greater extent near the center of minimum 
ressure. The rain-fall at Cape May was apparently the result 
of a local cyclone which did not greatly affect the height of the 
arometer. 
In No. 19 there was. a center of low pressure in Nova Scotia, 
the winds near the Lake region were generally from the 
northwest. At Norfolk the wind was from the south, and a 
new center of low pressure was forming near the coast of North 
coats The rain about Philadelphia on the morning of Jan- 
17th was apparently due to a local cyclonic movement, 
‘aire than to the influence of the low center in Nov arr pid 
The average distance of the center of greatest rain-fall fro 
the center of low pressure for cases north of latitude 36°, is i 
300 miles, but it sometimes exceeds 750 miles. 
In 19 cases the distance was less ae 250 siti 
11 between 250 and 500 miles 
5 ge eG oo 500 and 750 miles. 
3 * el over 750 miles 
