342 



The Ohio Naturalist. 



[Vol. Ill, No. 3, 



The following' table gives the above data in tal)ular form, 

 complete for each station : 



Precipitation (inches). 



Ashtabula 38.8 



Cincinnati 38.5 



Clarksville 40 o 



Cleveland 36.5 



Columbus •^81 



Findlay ■ 36.8 



Greenville 38.4 



Marietta 42.6 



:AIinigan 36.9 



Montpelier 37 3 



New Alexandria 43 . i 



Portsmouth 4-? . 2 



Sandusky 33 .6 



Toledo 30.9 



Wooster 37 9 



o 



6 95 

 3-69 

 6.60 



463 

 6.22 



Month, 



July . . . 

 March. 

 March . 

 July . . . 

 Jnly . . . 



Jn'y 



March . 

 July , 

 June . . 

 |ulv . . , 

 July 

 March . 

 July . 



July 



I 29 

 .90 



85 



: 06 



.81 



I 15 

 .88 



1. 12 

 .87 

 ■99 



1 . 1 1 



I 03 

 _ . , -95 



July ' 1 .02 



.96 



Month. 



October.. . 

 October. . . 

 October. 

 October. 

 October.. . 

 October . . 

 Octolier . . 

 October. . . 

 October. . . 

 October. . 

 October. . . 

 Octol er. . . 

 December 

 October. 

 October.. . 



o 

 ■7, 



64.2 

 18.6 

 IS. 5 



3S . 8 

 20.3 



33 J^ 

 2^.0 

 17 6 

 26. 3 

 36.6 

 26 6 

 19 9 

 26 9 

 32. 8 

 31 5 



Sky (No. days) 



D U 



166 



118 

 149 

 102 

 104 



"5 

 91 



97 

 121 

 106 

 132 

 129 



69 

 108 

 121 



Mean Temperaturk. (Plate IV Map V.) 



Taking up now the temperature of the state, we find a normal 

 range of 6° F., — from 49° F. in the extreme north to above 55° 

 F*. in the south. The annual isotherms vary quite regularly with 

 the latitude excepting in the north-central part of the state as the 

 map will show. 



Extreme Maximum Temperature. (Plate IV Map VI.) 



The highest temperature is normalh' reached in the latter part 

 of July. The only station differing from this was Milligan 

 with a maximum of 100° F. on August 11. The other fourteen 

 stations ranged in extreme maxima from 100° at Portsmouth 

 down to 92° at Greenville and 93° at Ashtabula. 



FZxTREME Minimum Temperature. (Plate IV Map VII.) 



The extreme minimum temperatures \-ary b>- twice as many 

 degrees as do the extreme maxinuun. At Portsmouth the aver- 

 age of lowest records is one degree below zero, while Montpelier 

 averages thirteen below and Milligan eighteen l.'elow zero. The 

 time of the coldest averages is about January 24 at Columbus, 

 this l)eing the earliest, and PVbruary 7, at Ashtaljula. As has 

 been ]ire\-iously shown l)y Prof. Mosele\- in his " Sandusk\- 

 P'lora," ice drifting eastward in Lake Erie ma>' prolong the cold 

 season at i)()ints toward the eastern end of the Lake. This prolv 

 abl\- explains the lateness of the records of extremes al Ashta- 



