E.. Loomis— Barometric Gradient in great storms. 443 
he 
nm = *00014585. 
ied : 
- 
y =the polar distance of the station, or the complement of 
the latitude. 
¢ = the inclination of the wind’s direction to the isobars. 
$ = the velocity of the wind in meters per second. 
r =the distance from the center of the low area expressed in 
meters. 
¢ =the temperature of the air in centigrade degrees. 
P = the pressure of the atmosphere in millimeters. 
P’ = 760 millimeters. 
side upon which the winds were strongest and the gradients 
were the steepest. I recorded also the wind’s velocity between 
the nearest isobar, and the state of the thermometer. I re- 
corded the latitude of the low center, and the diameter of the 
_first isobar, except in those cases in which its magnitude was 
apparently due to the lack of observations from that vicinity. 
hese measurements extended from the lowest isobar up to 
the isobars irregular. The latitude of the center of high pres- 
ed; and if the isobars were tolerably regular, 
the diameter of the highest isobar was measured. Several of 
the charts show the isobar 715™; there are more which have 
the isobar 720™; and a large number show the isobar 725™™. 
