394 The Iowa and Illinois Tornado. [July, 
connection, irresistibly lead me to the conclusion that the 
tornadoes in the two States are one and the same. 
The point where the tornado first struck the ground on 
South Skunk River is situated in 92° 20’ West Longitude and 
41°15’ North Latitude. It was finally lost track of near Peoria, 
in 89° 37’ West Longitude, and 40° 40’ North Latitude. The 
whole motion of the tornado, therefore, was 2° 43’ east, and 
35’ south, or 143 miles east, and 41 miles south. The mean 
direction of its path was 24° 51’ south, and 65° g’ east, and 
its whole motion 149 miles. The crookedness of its path 
renders its actual motion considerably greater. 
In a late communication Mr. B. Whitaker, correspondent 
of the Smithsonian Institute of Warsaw and Illinois, states 
that the elevation of the summit of the cloud was about 18’. 
The author thanks Elias Colbert, of the Chicago ‘“‘Tribune,” 
and the editors of the local newspapers at Washington and 
Sigourney, Iowa, for assistance rendered, and especially for 
publishing an extensive list of questions concerning the 
tornado, which secured for him valuable information from 
persons residing at a distance. 
