DYNAMIC METEOROLOGY. 



421 



Table of frt(jnciicy of tornadoes in each State— Contmued. 



State w 'I't'irilory. 



Idaho 



Illinois 



ludiaua 



Indian Territory . . 



Iowa 



Kansas 



Kentucky 



Lonisiaua 



Maine 



Maryland 



Massachusetta 



Micbigan 



Minnesota 



Mississippi . . 



Missouri 



Montana 



Nebraska 



Nevada 



New Hampshire 



New Jersey 



New Mexico 



New York 



North Carolina 



Ohio 



Oregon 



Pennsi Ivania 



Rhode Island 



South Carolina 



Tennessee 



Texas 



Utah 



Vermont 



Virginia 



Washington 



"West Virginia 



Wisconsin 



Wyoming 



Area in 

 units of 



10,000 

 scjuare 



miles. 



8.6 

 5.5 

 3.4 

 6.9 

 5.5 

 8.1 

 3.8 

 41 

 3.5 

 1.1 

 0.8 

 5.6 

 8.4 

 4.7 

 0.5 



14.4 

 7.6 



11.2 

 0.9 

 0.8 



12.1 

 4.7 

 5.1 

 4.0 

 9.5 

 4.6 

 0.1 

 3.4 

 4.6 



27. 4 

 8.4 

 1.0 

 0.1 

 7.0 

 2.3 

 5.3 



Finley's record. 



Tornadoes from 1874 to 1881, 

 inclusive (eight years 

 complete). 



Total 



Annual 

 ....... I. <^.. Length | c- i ,..„ j Annual average 



"T!lf;! i of record L£'.'ll!=>LN average per 10,000 



of torna- 

 does. 



(years). !'"""l>"- i p:;^ri^.,"^,uare 

 miles. 



6.2 

 3.0 

 0.1 

 3.2 

 6.9 

 0.6 

 1.4 

 1.4 

 1.0 

 0.9 

 1.6 

 2.6 

 1.1 

 5.0 

 0.1 

 1.8 

 0.1 

 0.4 

 0.6 

 0.1 

 2.5 

 1.8 

 2.6 



1.6 

 1.9 



2 2 



1.13 

 0.88 

 0.01 

 0.58 

 8.85 

 0.16 

 0.34 

 0.40 

 0.91 

 1.12 

 0.29 

 0.31 

 0.23 

 0.77 

 0.01 

 0.24 

 0.01 

 0.44 

 0.75 

 0.01 

 0.53 

 0.35 

 0.05 



0.47 

 0.41 

 0.08 



Wheu we consider the narrowness and shortness of the destructive 

 portion of the paths of most ••tornadoes," we see that even in Kansas 

 and Iowa the probability that any given spot will be vi.sited by one is 

 at the rate of less than 1 per cent, per century, or less than the chance 

 of death by lightning or railroad accident, or other casualty. 



These storms move along nearly with the prevailing gciuMiil current 

 of air at the cloud level, but deflecting somewhat as iiillueuced by tbe 



